Co-authored-by: DeepBlueV7.X <nicolas.werner@hotmail.de>

*  (confetti) message support.  Thanks @LorenDB !

* Initial commit for VoIP v1 implementation

* Added draft of event handlers for voip methods

* Added event handlers for VoIP events, added rejectCall, added version tracking for call version for V0 and V1 compatibility

* Added call events to the general message pipeline. Modified Call Reject mechanism

* Added message delegates for new events. Modified hidden events. Updated handle events.

* Updated implementation to keep track of calls on other devices

* Fixed linting

* Fixed code warnings

* Fixed minor bugs

* fixed ci

* Added acceptNegotiation method definition when missing gstreamer

* Fixed warnings

* Fixed linting

see #1042
see #483

* Use advanceWidth to get the with of the original text

Co-authored-by: Nicolas Werner <nicolas.werner@hotmail.de>

fixes #881

* making userName_ an AbstractButton should make it play nicely with the ListView

* make Avatar an AbstractButton

* make userName_ in Reply.qml an AbstractButton

* use alias for avatar background color and fix margin of username in reply

* add sendernames to state events

* Center state events and make them less tiny