The menu is now:
Slide Show
  Start from first Slide
  Start from current Slide
  ...
instead of:
Slide Show
  Slide Show
  Slide Show From This Slide
  ...

I also changed the recently introduced function name/uno command for "Start from current Slide".
This should make no trouble, since this function has not seen a release so far.

Change-Id: I248c9d63ec28071b2887f89912aa90fa1e4afcb5
Reviewed-on: https://gerrit.libreoffice.org/3604Reviewed-by: Fridrich Strba <fridrich@documentfoundation.org>
Tested-by: Fridrich Strba <fridrich@documentfoundation.org>