This is a combination of 3 commits:
* Make buttonstatuslistener a generic listener for any widgets
  ac97f323
* Move icon rotation/flip handling from ToolbarManager to vcl's Toolbar
  c5fe9890
* These should still be virtual.
  e20df218

Change-Id: I34e2446660ec94d60654b4db40ce1bbb8014477f
Reviewed-on: https://gerrit.libreoffice.org/20466Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
Tested-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>