Description of problem:

When a group membership type changes, the icon does not (immediately) change in the nav tree. 

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1. Inventory > Groups - Create a new, empty group, "foobar"
2. From the group view, note the "blank paper" (mixed group?) icon in the leftnav tree
3. Go to Inventory > Membership  
4. Add a bunch of compatible resource, i.e., linux platforms; save.
5. Upon save, view the leftnav tree.
6. Navigate back to Inventory > Groups and choose your "foobar" group from the list.
7. View the leftnav tree
  
Actual results:
"blank paper icon" remains until the user actually goes back and reloads the group from the main Inventory top-level tab.

Expected results:
Icon should probably update upon determination of group type (platform, server, service) and refresh the tree/icon


Additional info:
Are we actually supposed to see a tree in here too?  I currently don't.