Provides a way for users to actually delte their user drafts where
required.
For #3927
Added test to cover new endpoint.
Makes update to MD editor #setText so that new selection is within new
range, otherwise it errors and fails operation.
Ensures some sensible text is always in webhook text data.
Also aligned some notification reporting to use centralised activity
system instead of custom success events.
For #4216
Updated reply inidicator to fit with new nesting system, only showing on
view when nest within nesting structure.
Updated the general design to be a bit cleaner and better adapt on
mobile.
Tested on FF+Chrome, inc. dark mode.
- 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
- Fixes existing broken attachment edit tabs.
- Redesigns area to move away from old tabbed interface.
- Integrates new dropzone system, for both addition and edit.
This is to encourge the ":count" values to be used instead of 1s in the
translated variants so that non-pluralised languages are hardcoded with
"1"s in their content, even when not used in a singular context.
For #4040
