`No video device`

When a device has no camera Jami shows No video device as displayed in the image below.

This means that only audio calls can be made and screen sharing should be possible.

This provides reasons to:

1. See #1316 (comment 31593)
   Always show the Screen share button in audio calls (except if Enable video account setting is disabled)
2. Fixed with Version: 202111041938
   When there is an incoming video call, only display Answer with audio and do not show Answer with video
3. See #1316 (comment 31540)
   Not show the Place video call button in the top right
4. See #1316 (comment 31540)
   Not show Start video call in the context menu (found by right-clicking on a conversation)
5. See #1316 (comment 31593)
   Not to toggle to the camera when stopping the screen share
6. See #1316 (comment 31721)
   Should the camera preview not be shown when there is No video device?
7. Won't fix #1316 (comment 31533)
   Should Video strings be renamed Camera in the image above as it is understood that screen share is also a type of Video? For example:
   Audio and Video Settings → Audio and Camera Settings
Video → Camera
No video device → No camera device

What do you think?

Thank you

Linux Mint 20.2 Cinnamon