tdf101291 Resize cropmarkers.png to requested dimension

The pick-up positions for handles were changed some time ago and fit
cropmarkers.png of icon-themes Tango and Breeze. But Galaxy
and HighContrast were not adjusted. The patch will bring this by.

Change-Id: Ia55cc8c8196c2125f46f8f5755ec1063d68cb8e7
Reviewed-on: https://gerrit.libreoffice.org/28089Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: jan iversen <jani@documentfoundation.org>