Uncaught ReferenceError: jsToolBar is not defined

[xoox]

Hi, Thanks for this wonderful plugin. While using {{comment_form}} and {{comments}} macros, the following error was encountered.

System info : Linux 4.19.0-11-amd64 #1 SMP Debian 4.19.146-1 (2020-09-17) x86_64 GNU/Linux
Environment:
  Redmine version                4.1.1.stable
  Ruby version                   2.6.6-p146 (2020-03-31) [x86_64-linux]
  Rails version                  5.2.4.2
  Environment                    production
...
Redmine plugins:
  redmine_wiki_extensions        0.9.2

How to re-produce

• Install a fresh redmine system and add redmine_wiki_extensions as the only plugin.
• Change Administration -> Settings -> General -> Text formatting to "Markdown" (optional, Textile will show the same error.)
• Add a test project "testPro" with "Wiki extensions" module enabled.
• Go to "Wiki" section of the new created project and edit the start wiki page. Add the following text and save.

# Wiki

some text.

{{comment_form}}

• Open the developer tools of your browser. (For Edge/Chrome/Firefox, Press F12 on Windows)
• In the Console panel you will see error message of "Uncaught ReferenceError: jsToolBar is not defined"

Why it occurred

While viewing wiki pages, jstoolbar related Javascripts are not loaded by default, which are needed by {{comment_form}}.

Possible solutions

Add jstoolbar Javascripts in html header of wiki views. There're helper functions in Redmine which might be helpful. Click the following link for details. https://github.com/redmine/redmine/blob/master/lib/redmine/wiki_formatting/markdown/helper.rb

And would you please add/improve support for Markdown formatting?