Streaming/alpha

[RemyMess]

Issue #458

[RemyMess]

@AlainRossier Be sure to add your ChatBox changes in LivestreamAdminPage, LivestreamSpeakerPage, LivestreamAudiencePage, (and LivestreamRoomPage: that latter was the attempt of unifying the three files but we dont use it know. We'll refactor it in the future though)

[AlainRossier]

Important things to be fixed

• [x] Moving slides and live button doesn't work for the participants
• [x] UI "Prev" "Next" "Live" polish
• [x] Clapping is not broadcasted to people in the audience
• [ ] Black lines on the left when sharing screen
• [x] Request mic frontend polish (Admin)
• [x] Request mic frontend polish (Audience)
• [x] Toggle "View slides" when slides are uploaded
• [ ] Black rectangle still remaining for speaker
• [x] Help box: say go back and forth indep of the speaker

[RemyMess]

Hotfixes fixes when mic is revoked:

• [x] No black rectangles (palceholder for webcam attendee) on admin page when mic is revoked.

• [ ] No black rectangles (palceholder for webcam attendee) on speaker page when mic is revoked.

• [ ] No black rectangles (palceholder for webcam attendee) on other attendees page when mic is revoked.

• [x] No black rectangles (palceholder for webcam speaker) on admin page when speaker leaves; NB: it becomes black for 10seconds, then it deletes itself

• [ ] No black rectangles (palceholder for webcam speaker) on speaker page when speaker leaves

• [ ] No black rectangles (palceholder for webcam speaker) on other attendees page when speaker leaves.

[AlainRossier]

UI slides button