Make delete presentation btn announce presentation name

Improve labels announced for modal titles

Recording: Strip control characters in whiteboard text events

Breakouts (moderator) Add current time to aria labels for + and - btns

Add aria-describedby to youtube input

Move focus to poll panel when opened

Change hotkey labels to keyboard shortcuts

Fix aria-expanded on userlist toggle btn

Further color contrast in polling, breakouts modal, user-list

Unshare webcam when join in a breakout room

Fix breakout room notification with wrong initial state.

Fix error in checking systemd status

Sometimes when text is pasted into the whiteboard text tool from
external apps, it'll include control characters that mess up later
recording processing scripts.

Run the same cleanup as already used for chat messages on the whiteboard
text as well.

The cleanup has been adjusted to allow newline and tab characters. They
won't really cause issues in chat, and newlines (at a minimum) are
required for the whiteboard.

This is a workaround for #7356

Cursor not showing multi user whiteboard

Adds outline to elements for high contrast themes (windows)

Fix text annotation

Hide tomcat7 warnings if tomcat7 not installed