#78 Deleting current slice forces relogin

[Howard Fore]

If I'm in a slice and delete it while superadmin, I'm
forced to relogin. The system should autoselect a slice
for me. Relogin isn't necessary if I'm superadmin.

To reproduce:
- login as superadmin
- select a slice, check "Deleted" box in Slice properties
- switch over to "AA", then click "Delete" from the
left nav bar
- Click the "delete" link for the slice to actually
delete then confirm
- error message comes up saying that AA couldn't find a
slice for me and has link to login page
- when I login (again as superadmin) AA selects a slice.