UI fixes + rebase on SDK 5.5

mark chat as read if message received while conversation is opened and at end LINQT-2442

remove warnings

revert flickable change in abstract settings layout leading to mouse focus issue

update SDK to release/5.5 to fix black screen on screen sharing LINQT-2453 (change ephemeral api)

wait for main window to be created to display fetch config error LINQT-2413

focus emoji picker search field on opened LINQT-2445

force focusing chat search bar when research done (otherwise focus is lost if chat previsouly focused becomes invisible) LINQT-2377

update screen list when screen plugged/unplugged LINQT-2454