Started support for editor view.
Moved comment elements to be added relative to content area instad of
specific target reference element.
Added relocating on screen size change.
- Updated anchor scroll change to open up details blocks if the target
exists within.
- Updated highlighting and animation implementation to fix hardly visible highlighting.
- Removed old, now unused, handing of CM instances in details blocks.
Related to #4637.
- Updated pointer to move within content DOM so that you can back-focus
into the pointer if desired.
- Added new "Section select mode" which toggles focusabiltiy for main
content sections, with ability to show pointer via enter press on
these.
- Updated pointer with proper input/button labelling.
Tested via orca screen reader on Firefox/Fedora/Gnome.
For #3975
- Updates old components to newer format, removes legacy component
support.
- Makes component registration easier and less duplicated.
- Adds base component class to extend for better editor support.
- Aligns global window exposure usage and aligns with other service
names.
