Session/Toolbars:

Session/Toolbars:
	* src/LyXAction.C: LFUN_TOOLBAR_TOGGLE_STATE
	* src/session.h/C: add ToolbarSection class
	* src/lyxfunc.C: handle LFUN_TOOLBAR_TOGGLE_STATE
	* src/frontends/LyXView.h/C: toggleToolbarState(name)
	* src/frontends/Toolbars.h/C: initFlags, toogle and save toolbar,
	    changed update logic
	* src/frontends/qt4/QLToolbar.h/C: saveInfo. Surprisingly little is
	    asked from frontend.
	* src/frontends/qt4/GuiView.C: save toolbar when lyx exits
	* src/MenuBackend.h/C: add Toolbars submenu
	* src/lfuns.h: add LFUN_TOOLBAR_TOGGLE_STATE
	* src/ToolbarBackend.h: add AUTO flag
	* lib/ui/stdmenus.ui: add view->Toolbar menu

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15691 a592a061-630c-0410-9148-cb99ea01b6c8