Improve talk mobile, narrow screens and sidebar experience.

[marcoambrosini]

• Collapse the start call button into an icon-only button
• Create a row for avatar, name, and date above a messageGroup and make text full-width

cc @nextcloud/designers @nickvergessen this is a quick big win

[nickvergessen]

There are many things wrong on mobile atm, but it's not on the roadmap as we have mobile clients

Ref

• Confusing UI for mobile users accessing call by url #10091
• UI issues on Zfold4 during call #9936
• experience browser/mobile  #6969

[marcoambrosini]

@nickvergessen This is also about the desktop experience, especially in the sidebar during calls. Or on small laptops with the two sidebars open.

Wireframe of the idea above:

[Antreesy]

It would work nice IMO, if we decide to proceed with showing a timestamp and checkmark for the whole message group instead of each message (messages are combined in group if they were posted within 5-minutes interval, and it's still available for each message in buttons bar)

[Antreesy]

For bringing this up a bit:

• could RFC: Move the read marker to the left side next to the message #11212 be an option?