Currently, you have to:
1. View the overview lists, decide which items to delete
2. Open up the popup for each object (subcluster, profile, appgroup etc.)
3. Check the box and press delete for each one
It is likely that the overview, where you can see the names (and a few details) about the other objects, is a better place to present the decision about deleting objects.
This is similar to bug 8225 which is about terminating multiple sessions at the same time.
Created attachment 1161 [details]
Example of how the popup could look with a cancel button instead of delete
Moving the "Delete" decision to the overview lists would also allow the buttons at the bottom of the popup to look more standard. Having the choices of "Cancel" or "Save" is more common than "Delete" or "Save" in these types of interfaces.
Created attachment 1162 [details]
Example of how the overview could look with a delete checkbox
If we want to follow the style of checkboxes for delete (used in "Introduction Texts") the profile list overview could look something like this.
It should be noted however, that using checkboxes for delete is quite old-fashioned.
Created attachment 1163 [details]
Example showing a delete button appearing on hover
If we aren't concerned about touch devices (which might not be smart?) we could trigger showing a delete button on :hover.