Fixes #14337

The new audio player sets the background and foreground colors automatically
based on the thumbnail of the audio file, but the mastodon-light theme
overrides the controls' colors with a hardcoded color, which sometimes make
them unreadable.

* Refactor list of emoji requiring added outlines so that it can be theme-specific

* Split inaccessible emoji to emoji requiring an outline and ones that can be inverted

* Drop the “silouhettes” from black emoji as they seem to have changed color

* Add inaccessible emojis list for the light theme

* Use bordered emoji variant instead of unreliable CSS

This commit redesign the polls and increases characters limit for the
options from 25 to 50 characters, giving pollsters more freedom.

Summarizing, the redesign is making the polls more adaptive for upcoming
changes to the options characters limit: the bar, or a "chart", is now
displayed separately from the option itself; vote check mark is moved
next to the option text, making the percentages take less space. Option
lengths are taken into account and text is wrapped to multiple lines
if necessary to avoid overflow.

Also:

- Fix embed modal in light theme
- Fix confirmation modal in light theme

* Add some explanation to the mute modal dialog

* Remove `isSubmitting` from mute modal code, this wasn't used

* Refactor block modal

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

* Refactor SCSS a bit

* Put mute modal toggle to the same side as in the report dialog for consistency

* Reword mute explanation

* Fix mute explanation styling

* Left-align all text in mute confirmation modal

* Fix more visual issues with the audio player

- Add horizontal baseline in the middle of waveform
- Fix audio player colors in light theme
- Use audio element instead of web audio API
- Do not render any bars until the file is loaded
- Do not allow interactions with waveform until the file is loaded

* Fix code style issue

* Fix tabs bar in light theme

* Fix borders on small screens in light theme

* Change full logo to use primary text color of the given theme

* Fix colors of public layout header in light theme

* Fix typo in light theme

* Fix background color of empty column

Fixes #9990

Fix #8209
Fix #7566

This reverts commit 7da74e3157.

* Fix background color of emoji-mart-bar

* Uniform emoji-mart-search background color in light theme as default

* Fix colors of mastodon-light theme

Fix colors of modals and focused toots in light theme
Fix colors of compose-form items and more
Fix colors of status__content__spoiler-link:hover and $valid-value-color
Change success green color in light theme

* Fix some sass codes

* Add !default for explicit color valiables in default theme

for overwriting colors easier in the other themes

* Revert "Remove pointer to light theme until it is more polished (#7594)"

This reverts commit f8cf85db3b.

* True up the hierarchical structure of mastodon-light theme

* Fix mastodon-light theme