add signal that provides action when triggered
* ToolbarBackend.[Ch]
add popupmenu and iconpallete item types
* QLToolbar.[Ch]
take care of popupmenu and iconpallete
* stdtoolbars.inc
add panels and menus (and move spellchecker to main ;-)
* functions.xpm
icon for function list
* iconpalette.[Ch]
new iconpanel that will replace old iconpalette,
als subclass of qmenu that updates parent toolbutton
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17868 a592a061-630c-0410-9148-cb99ea01b6c8
