Prevents dark-mode feedback link from turning blue
when clicked, caused by styles in the
`.mixin-vector-dropdown-menu-item()` mixin
Additionally, decreases the size of the heart icon
beside the dark-mode feedback link.
Bug: T367871
Change-Id: I348dbafcc3d3d3519da77dc6799818fdd743bba2
Addresses edge-cases for feedback link for dark-mode.
- Feedback link should not be visible if dark-mode gadget is enabled.
- Feedback link should not be visible if page is excluded from dark mode.
Additionally, turns feedback link green after click
and prevents further clicks on link (without removing link,
since removing the link changes the margins on the text)
and adds heart icon beside success message.
Bug: T367871
Change-Id: Idff14ffa7e8f497ec38250cf10252e998c234057
Notes:
* This is functional but intentionally not designed until the design
has been finalized.
* A feature flag is added that swaps out the limited width toggle with
a settings cog
* The preferences module is kept in a separate ResourceLoader module
(skins.vector.clientPreferences) to make it more portable for
when we eventually want to add it to Minerva as well.
* Intentionally have not focused on non-jS version given we will
likely revise this again in a future version/upstream to core.
Bug: T345363
Change-Id: I0c793b73e0676e32f031c6168c292f63908c72e3
