Update check for ffmpeg 4.1

Fix file uploader mobile

Fix skip to slide handler

UI improvements and bug fixes

Improve webcam picker

Fixed incorrect error toast on screenshare presenter exit

Fix proptype warnings

Use yq to pull from bbb-webrtc-sfu default.yml

Revert video SFU connection error detection

Add config param to show userlist / chat on join

Fix Safari issue with processing ICE candidates for video

Fix send button

Make resizable panel width persist