* Created desktop reactions menu

Moved raise hand functionality to reactions menu

* Added reactions to chat

* Added animations

* Added reactions to the web mobile version

Redesigned the overflow menu. Added the reactions menu and reactions animations

* Make toolbar visible on animation start

* Bug fix

* Cleanup

* Fixed overflow menu desktop

* Revert mobile menu changes

* Removed unused CSS

* Fixed iOS safari issue

* Fixed overflow issue on mobile

* Added keyboard shortcuts for reactions

* Disabled double tap zoom on reaction buttons

* Refactored actions

* Updated option symbol for keyboard shortcuts

* Actions refactor

* Refactor

* Fixed linting errors

* Updated BottomSheet

* Added reactions on native

* Code cleanup

* Code review refactor

* Color fix

* Hide reactions on one participant

* Removed console log

* Lang fix

* Update schortcuts

🔥🔥🔥

This PR takes The Bulldozer Approach (R): removes the old toolbox and lots of
associated code, though not all of it. Subsequent cleanups will follow.

* Javadoc introduced @code as a replacement of <code> and <tt> which is
  better aligned with other javadoc tags such as @link. Use it in the
  Java source code. If we switch to Kotlin, then we'll definitely use
  Markdown.

* There are more uses of @code in the JavaScript source code than <tt>
  so use @code for the sake of consistency. Eventually, I'd rather we
  switch to Markdown because it's easier on my eyes.

* Xcode is plain confused by @code and @link. The Internet says that
  Xcode supports the backquote character to denote the beginning and end
  of a string of characters which should be formatted for display as
  code but it doesn't work for me. <tt> is not rendered at all. So use
  the backquote which is rendered itself. Hopefully, if we switch to
  Markdown, then it'll be common between JavaScript and Objective-C
  source code.

* ref: video muted state

Get rid of 'videoMuted' flag in conference.js

* ref: audio muted state

Get rid of 'audioMuted' flag in conference.js

* fix(conference.js|API): early audio/video muted updates

* ref(conference.js): rename isVideoMuted

Rename isVideoMuted to isLocalVideoMuted to be consistent with
isLocalAudioMuted.

* doc|style(conference.js): comments and space after if

* ref: move 'setTrackMuted' to functions

* fix(tracks/middleware): no-lonely-if

* ref(features/toolbox): get rid of last argument

* ref(defaultToolbarButtons): rename var

Make toolbar's microphone button enabled whenever there are any
'audioinput' devices available and allow to add audio during
the conference even if microphone permissions were denied on startup.

Dynamically enables/disables the toolbar video button. Prior to that
commit if we would start with no video there would be no way to enable
it later on.