Change pGearMenu->CheckItem( pGearMenu->GetItemId("gear_iconOnly") ) style to
pGearMenu->CheckItem( "gear_iconOnly" ) style, where it is possible.

Change-Id: I6ec77eac51be14a8e5d278bd3604cb65b3d1f006
Reviewed-on: https://gerrit.libreoffice.org/57172
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>