Detail buttons on PS List don't work

[acrosman]

Describe the bug
When attempted to use the buttons on the Permission Set List the describe lookup fails.

To Reproduce
Steps to reproduce the behavior:

1. Load app
2. Log into Org
3. Fetch the permission set list.
4. Click on one of the detail buttons that appears with the list.
5. Invalid URL error reported in the raw response area.

Expected behavior
It interface should shift to the detail display for the selected permission set. You can see this behavior by switching to the permission set detail display and entering the name of the permission set. It is worth noting this also triggers the describe query failing above and it runs successfully.