utility.product: fixing the default preference for the branding

Change-Id: I5d867464c651bfcbe749994833b8fc85535bb85b
Merge branch '3.2.x' of ssh://git@github.com/ControlSystemStudio/cs-studio.git into 3.2.x
Merge branch '3.2.x' of ssh://git@github.com/ControlSystemStudio/cs-studio.git into 3.2.x
utility.product.default: refactor move plugin into applications/plugins

Change-Id: I02558f841a761241c6c872caa84c010b49877a56