Add "Mapped Applications" tab to Group view & optional dashboard integration.

Currently, we can see which applications have access to a group.  I propose adding a tab within the group view that lists the applications mapped to that group.  Optionally, display application icons next to group names in the dashboard list for a quick visual overview. 

Benefits: 
- Improved group management & troubleshooting.
- Better overview of group access.
- Enhanced admin experience.