Brings a lot of features (icons, keyboard shortcuts,
customization, context menu interception etc.)
Other changes:
- Make SfxDispatcher::ExecutePopup take PopupMenuFlags
arg, to be able to pass NoMouseUpClose, so that the
menu won't close on mouse-up under anything != gtk3.
- Make .uno:OpenFromWriter and .uno:OpenFromCalc async
slots, to avoid crash under gtk3 when recycling the
current frame.
- Don't show the menu in customization dialog, if
experimental mode disabled.
Change-Id: Ieea2f73f6b48fbaf4bdfc4acf1a33d25422357cb
Reviewed-on: https://gerrit.libreoffice.org/33101
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Maxim Monastirsky <momonasmon@gmail.com>