Julian Lam 2270a88e93 feat: Taskbar icon colour change + visibility icon
For composers, the taskbar icon will now reflect the colour and
icon for the category you are posting in.

For chats, a proper chat icon is used.

In both, an "active" modal/composer will show a little eye icon
showing that it is active.
..
alerts.less
bottom-sheet.less
composer-default.less
cookie-consent.less
fab.less
morph.less
nprogress.less
taskbar.less feat: Taskbar icon colour change + visibility icon
usercard.less