Add extra logs when handling messages on redis

Fix whiteboard text-area not allowing input on Firefox

Fix unnecessary re-renders caused by #11480 changes

Add break-word to system messages

Fix moderator welcome message closing border

Do not return empty array when groupChats is empty

Instead, return empty array when both users and groupChats arrays are empty.
The public chat and user chats may be active when groupChats array is empty.
Fixes #11476

Fix nav-bar unread message indicator

Shortcut help for toggle fullscreen 

Show polling button over the full-screened shared-screen

Enable arrow keys immediately after fullscreen

Prevent ejecting user from them main room when leaving breakout room

Remove unused 'app.poll.yn' from locales/en.json

Do not uncessarily fetch locales at first time you open/save settings menu

Show modals overlaid on full-screen slide or shared screen

Fix skip check test

Akka config

This change introduces a config file
`/etc/bigbluebutton/bbb-fsesl-akka.conf` which reads the default config
from packages and allows operators to keep their own config file changes
across package upgrades.

bbb-conf is adjusted to deal with this change.

config files from packages should not be changed unless they reside in
/etc

Reduces the number of options displayed on locale settings dropdown

Implemented merge option for default and local settings.

Fix bbb_skip_check_audio_on_first_join parameter

When user observing changes, we must guarantee these changes are from main room, and not from breakout one.
Fixes #11029

Locales would be fetched even if you simply open and save settings window (without changing any setting)
We now test it similarly we do on 2.2
Closes #11318

Remove setNumberOfHTML5Processes

Fix layout params (show participants + show public chat) not affecting the meeting