Also hid 'Extrusion On/Off' button in the extrusion toolbar

Change-Id: I768ba62878039a18cad8294046b3ae84d762d91b
Reviewed-on: https://gerrit.libreoffice.org/12046Reviewed-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>
Tested-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>