fix background issue of screen choosing

--the current implementation discovers only the first screen
and tries to avoid other configurations
Merge branch 'test-fixes-deprecate-taskmanager' into tests-fixes
fix loading windows in startup for new architecture
update information files
Merge branch, and update information files

Conflicts fixed:
	README.md
	components/ptaskmanager.cpp
	qdbus/mechanism/findwallpaper.cpp
added ChangeLog information
Merge branch

Conflicts fixed:
	ChangeLog