Fixes in CSS for accessibility

Small fix in login modal css

Small CSS fixes on font size

Many HTML & Accessibility fixes

CSS changes for accessibility

CSS Fix for links z-index

CSS Fixes

Merged DMP Roadmap V2.1.4

Fix for the formatting issues with bullet points for exported docx plans ...

when viewed in an old Word editor.

The fix follows the solution suggested in  the HtmlToWord bug "List item
bullets corrupted in Microsoft Word"
https://github.com/karnov/htmltoword/issues/73 suggested by David
Verhasselt @dv.

Changes:
   - Firstly, removed earlier attempted fix in commit
     5ef7e05 (Fix for format issues for
     bullet points in Plan docx exports).
   - Made a copy of Htmltoword (1.1.0) xslt stylesheets functions.xslt
     and numbering.xslt and made changes suggested by https://github.com/karnov/htmltoword/issues/73
   - Prepended the Htmltoword library XSLTHelper method xslt_path() in
     config/initializers/htmlto_word_xslt_helper.rb. This method ensures
     the Htmltoword library picks up the changed  numbering.xslt template instead of
     the library's version.
   - pinned version of htmltoword to 1.1.0

Fix for issue #2147.

Removed front page logo & CSS fix

Rework on navigation menu

CSS fixes in footer

Changed footer font size

Complete rework of footer

Fixes to footer css

Solved(?) 404 issue on jquery ui datepicker css

Add an outline to table cell that is in focus. ...

Note we use the css :focus-within psuedo class that is not supported in either
IE or Edge
https://developer.mozilla.org/en-US/docs/Web/CSS/:focus-within

Fix #2170

Fixes to research outputs display

Merge pull request #2211 from DMPRoadmap/issue2175 ...

Added functionality to give warnings when links open in new windows.

Merge pull request #2224 from DigitalCurationCentre/feature/remove_users ...

Allow Super admins to Archive and Merge users

New cnrs logos

Added functionality to give warnings when links open in new windows. ...

The solution is based on the recommendation in "Techniques for WCAG 2.0" section
"G201: Giving users advanced warning when opening a new window":
"Example 2: Using CSS to provide a warning before opening a new window"
(cf., https://www.w3.org/TR/WCAG20-TECHS/G201.html)

Changes:

- any link in the views with target="_blank" has had css class "has-new-window-popup-info" to the link together with the span   <span class="new-window-pop-info"><%= _('Opens in new window') %></span>.
- The javascript script externalLink.js is used for external links that don't have the target="_blank" in the view.

Fix for issue #2175.

Fix for making links have a higher color contrast to other text in blocks. (#2192) ...

The changes were based on the article  https://www.viget.com/articles/color-contrast/

Changes:
 - Link color has been  changed from #337ab7 to #107896.
According to https://webaim.org/resources/linkcontrastchecker/?fcolor=000000&bcolor=FFFFFF&lcolor=107896 (the "Link to Body Text" ratio is 4.14:1 and passes WCAG A test and "Link to Background" ratio is 5.06 and passes the 5.06:1 which satisfies WCAG AA test.)
- The TinyMce editor required new stylesheets to be created.

Fix for issue #1457

Fix for fonts in html export, need to find fix for pdf export

Removed video tutorials from git and used Youtube video

CSS Fixes to the research output readonly mode

Added readonly mode to research outputs

Added edition button on research ouput form

Merged DMPRoadmap V2.1.2

Moved Visibility form below feedback form