Feat/multiple sessions one window

[malmen237]

What does this do?

Multiple calls

This allows the user to add another line-call into the call-window. A button opens a "join-production"-form which connects the user to an additional call. There is no limit for how many calls you can connect and if the window-max-width is reached then the next addition will be placed on a row beneath the first ones.

Updated leave call

Each call have a individual "leave"-button and if "back-button" or "home" is pressed that is used as a "leave all calls"-functionality.

Added confirmation when pressing a leave-call button

[Saelmala]

Overall LGTM and works for me (when the change device PR is approved and the //TODO's can be removed from here).

There are improvements in UI that can be done but since there are tickets to change the UI over the upcoming sprint/sprints I think this is fine for now. One quick UI fix I'd like however is to add a border to the modal for confirming to leave all calls - the modal's background is very close in color to the page background so I think a border would be good.

[malmen237]

Overall LGTM and works for me (when the change device PR is approved and the //TODO's can be removed from here).

There are improvements in UI that can be done but since there are tickets to change the UI over the upcoming sprint/sprints I think this is fine for now. One quick UI fix I'd like however is to add a border to the modal for confirming to leave all calls - the modal's background is very close in color to the page background so I think a border would be good.