documentation: update changelog

The commit updates the `changelog` for the `1.16.0` release including:
- notable new features, improvements and fixes.
- any potential breaking changes.

Signed-off-by: vince-fugnitto <vincent.fugnitto@ericsson.com>

CHANGELOG.md

@@ -4,19 +4,61 @@
 
 [1.16.0 Milestone](https://github.com/eclipse-theia/theia/milestone/22)
 
- - [workspace] added support for multiple selections in 'Add folder to workspace' dialog. [#9684](https://github.com/eclipse-theia/theia/pull/9684)
- - [debug] added support for managing debug sessions for extensions from debug panel (previously only possible using `Hosted Plugin` commands) [#8706](https://github.com/eclipse-theia/theia/pull/8706)
+- [bulk-edit] fixed incorrect border styling property [#9100](https://github.com/eclipse-theia/theia/pull/9100)
+- [callhierarchy] added additional call-hierarchy support [#9681](https://github.com/eclipse-theia/theia/pull/9681)
+- [core] downgraded `keytar` dependency to `7.2.0` for broader operating system compatibility [#9694](https://github.com/eclipse-theia/theia/pull/9694)
+- [core] fixed `diff` labels [#9786](https://github.com/eclipse-theia/theia/pull/9786)
+- [core] fixed file-tree scroll bug [#9713](https://github.com/eclipse-theia/theia/pull/9713)
+- [core] updated `:focus` styling to remove `!important` rule for extensibility [#9700](https://github.com/eclipse-theia/theia/pull/9700)
+- [core] updated `workbench.editor.closeOnFileDelete` default to `false` [#9720](https://github.com/eclipse-theia/theia/pull/9720)
+- [core] updated expansion-toggle icon styling when selected [#9770](https://github.com/eclipse-theia/theia/pull/9770)
+- [core] updated selected tree node styling [#9742](https://github.com/eclipse-theia/theia/pull/9742)
+- [core] updated view-container to preserve the collapsed state of a tree-view when reloading the application [#9636](https://github.com/eclipse-theia/theia/pull/9636)
+- [debug] added support for managing debug sessions for extensions from the debug panel (previously only possible using `Hosted Plugin` commands) [#8706](https://github.com/eclipse-theia/theia/pull/8706)
+- [debug] added support for the `debugIcon.startForeground` color [#9759](https://github.com/eclipse-theia/theia/pull/9759)
+- [debug] fixed behavior which incorrectly modifies the `settings.json` when adding debug configurations [#9719](https://github.com/eclipse-theia/theia/pull/9719)
+- [debug | plugin] added `DebugSessionOptions` vscode API [#9613](https://github.com/eclipse-theia/theia/pull/9613)
+- [documentation] updated `yarn` prerequisites [#9726](https://github.com/eclipse-theia/theia/pull/9726)
+- [editor] added support for the `workbench.action.revertAndCloseActiveEditor` command [#9728](https://github.com/eclipse-theia/theia/pull/9728)
+- [monaco] fixed quick-command separator when no recently used commands are present [#9783](https://github.com/eclipse-theia/theia/pull/9783)
+- [monaco] support `in` operator for `when` clauses [#9492](https://github.com/eclipse-theia/theia/pull/9492)
+- [monaco] updated styling in the peek-widget [#9725](https://github.com/eclipse-theia/theia/pull/9725)
+- [monaco] upgraded `monaco` dependency to `0.23.0` [#9154](https://github.com/eclipse-theia/theia/pull/9154)
+- [navigator] added support for `open editors` [#9284](https://github.com/eclipse-theia/theia/pull/9284)
+- [plugin] added support `deprecated` diagnostic-tags [#9721](https://github.com/eclipse-theia/theia/pull/9721)
+- [plugin] added support for searching in `tree-view` parts [#9703](https://github.com/eclipse-theia/theia/pull/9703)
+- [plugin] added support for the `workbench.files.action.refreshFilesExplorer` command [#9738](https://github.com/eclipse-theia/theia/pull/9738)
+- [plugin] aligned collapsible item behavior with vscode [#9696](https://github.com/eclipse-theia/theia/pull/9696)
+- [plugin] fixed `TaskDto` conversion [#9740](https://github.com/eclipse-theia/theia/pull/9740)
+- [plugin] fixed `is_electron` TypeError [#9730](https://github.com/eclipse-theia/theia/pull/9730)
+- [plugin] fixed `stop` and `restart` for hosted-plugins [#9780](https://github.com/eclipse-theia/theia/pull/9780)
+- [plugin] fixed custom-editor activation [#9671](https://github.com/eclipse-theia/theia/pull/9671)
+- [plugin] fixed hosted-plugin dialog for the electron target [#9764](https://github.com/eclipse-theia/theia/pull/9764)
+- [plugin] fixed incorrect `tree-view` item ordering [#9775](https://github.com/eclipse-theia/theia/pull/9775)
+- [plugin] fixed webworker creating for frontend plugins [#9715](https://github.com/eclipse-theia/theia/pull/9715)
+- [preferences] added additional open preferences commands [#9785](https://github.com/eclipse-theia/theia/pull/9785)
+- [quality] fixed incorrect `src/` import statements [#9753](https://github.com/eclipse-theia/theia/pull/9753)
+- [quality] fixed miscellaneous typos [#9753](https://github.com/eclipse-theia/theia/pull/9753)
+- [repo] upgraded `yarn.lock` [#9683](https://github.com/eclipse-theia/theia/pull/9683)
+- [scm] added tooltip support for resources [#9745](https://github.com/eclipse-theia/theia/pull/9745)
+- [search-in-workspace] added history support in input fields [#9524](https://github.com/eclipse-theia/theia/pull/9524)
+- [search-in-workspace] added support for the `expand-all` toolbar item [#9749](https://github.com/eclipse-theia/theia/pull/9749)
+- [search-in-workspace] improved the search result message under different conditions [#9429](https://github.com/eclipse-theia/theia/pull/9429)
+- [task] added support for deep task comparison [#9647](https://github.com/eclipse-theia/theia/pull/9647)
+- [task] fixed fallback to `lastCwd` when `getCwdURI` fails [#9695](https://github.com/eclipse-theia/theia/pull/9695)
+- [vsx-registry] fixed search input behavior [#9772](https://github.com/eclipse-theia/theia/pull/9772)
+- [workspace] added support for multiple selections in `add folder to workspace` dialog [#9684](https://github.com/eclipse-theia/theia/pull/9684)
 
 <a name="notable_changes_1.16.0">[Notable Changes:](#notable_changes_1.16.0)</a>
 
 - [application-manager] defines a new range for `webpack` (`^5.36.2 <5.47.0`). `webpack@5.47.0` depends on `webpack-sources@^3.0.1` but this new version produces bogus bundles in Theia applications. The fix works by constraining the `webpack` version range to not pull newer versions for Theia v1.16.0 meaning clients creating Theia applications will not be affected by the bundling failures caused by the new dependency. The bogus library will most likely be fixed before next release (v1.17.0) so we'll need to update the `webpack` range back to pull newer versions again (bug/performance/security updates).
 
 <a name="breaking_changes_1.16.0">[Breaking Changes:](#breaking_changes_1.16.0)</a>
 
-- [debug] `DebugSession` and `PluginDebugSession` constructors accept a `parentSession` of type `DebugSession | undefined` as their 3rd parameter, offsetting every subsequent parameter by one. [#9613](https://github.com/eclipse-theia/theia/pull/9613)
+- [callhierarchy] `CurrentEditorAccess` is deprecated. Use the version implemented in the `editor` package instead. The services in `call-hierarchy` that previously used the local `CurrentEditorAccess` no longer do [#9681](https://github.com/eclipse-theia/theia/pull/9681)
+- [debug] `DebugSession` and `PluginDebugSession` constructors accept a `parentSession` of type `DebugSession | undefined` as their 3rd parameter, offsetting every subsequent parameter by one [#9613](https://github.com/eclipse-theia/theia/pull/9613)
 - [monaco] upgraded to monaco 0.23.0 including replacement of `quickOpen` API (0.20.x) with `quickInput` API (0.23.x) [#9154](https://github.com/eclipse-theia/theia/pull/9154)
-- [call-hierarchy] `CurrentEditorAccess` is deprecated. Use the version implemented in the `editor` package instead. The services in `call-hierarchy` that previously used the local `CurrentEditorAccess` no longer do. [#9681](https://github.com/eclipse-theia/theia/pull/9681)
-- [workspace] `WorkspaceCommandContribution.addFolderToWorkspace` no longer accepts `undefined`. `WorkspaceService.addRoot` now accepts a URI or a URI[]. [#9684](https://github.com/eclipse-theia/theia/pull/9684)
+- [workspace] `WorkspaceCommandContribution.addFolderToWorkspace` no longer accepts `undefined`. `WorkspaceService.addRoot` now accepts a `URI` or a `URI[]` [#9684](https://github.com/eclipse-theia/theia/pull/9684)
 
 ## v1.15.0 - 6/30/2021