Implementation of a full fledged query panel + Feature Grid

[offtherailz]

As a MapStore user I want to be able to search features from the layers as it was available in MapStore (1).

We should so integrate the current query panel and the feature grid to create an advanced search tool for the layers that covers the functinalities available in the old QueryPanel + FeatureManager + FeatureGrid available in MapStore (1).

Estimated tasks and decisions:

• Provide a way to select the layer to query (e.g. a button in the TOC, context-menu). This should open the panel. This should be a panel like the toc (maybe from the opposite side) or inside it.
• Add support to retrieve attributes and types from DescribeLayer ( current tool is configured statically).
• Support numeric attribute validation
• The search action should switch the same panel to the table of results, and provide a button to back to search.

Advanced features:

• retrieve existing values from WPS, with pagination (requires changes in the widget library used, see react-select and react-select-virtualized

[offtherailz]

Duplicated, going to close