framework refactoring and new code to support status bar merging and UNO
StatusbarControllers

(cherry picked from commit 0b3a7747)

Conflicts:
	framework/source/uielement/statusbarmanager.cxx
	framework/source/uielement/toolbarmerger.cxx

Change-Id: I334a220ff27bb365e98a0ebd8bc6e55d65e76d64