Add options to set camera modes for mosaic/grid/calls.

Change waiting room design to fit camera preview size. Fix avatar sizes. Fix preview size to be 16/9 and below main view in call. Add a button to copy ICS string from ICS in chat. Synchronization of conference info. Allow to remove them. Avoid openning a conversation on sip url and copy the URL into the smartsearchbar. Update dialpad to show history. Clicking on it will erase it.