Move logs:SignalHandlers to core/crash_reports:CrashReports.
Move all pre-launch windows to core/crash_report_window module.
Move some global code to core/launcher:Launcher.
It should replace settings / platform_specific module in some way.
Use Qt::Dialog instead of Qt::Tool which works better with window
activation / deactivation handling.
Stop displaying the panel on all spaces when the call is established.
Also implement panels that appear in all spaces on macOS.
Using them for calls panels and custom notifications, so it
will be possible to use custom notifications in macOS as well.
