Changes:
+ added ui file for start center, calc and impress
+ NotebookBar not visible in Math, Draw

Change-Id: Ie35935e67524ac712930b088591e9e53955de4a1
Reviewed-on: https://gerrit.libreoffice.org/24860Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
Tested-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>