Now that SfxGroupInfo_Impl stores the model where each script came from
we can expose that information for the selected script in the script
selector dialog via a new method called GetScriptModel.
Change-Id: I7d9baaa99c276842e3b7e6bcacf89a915bcdca33
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/206151
Reviewed-by: Neil Roberts <nroberts@libreoffice.org>
Tested-by: Jenkins