Description of problem:
While bookmarking a search on smart variables, the UI uses invalid `controller` so no bookmark is being created. There is no error displayed

the used controller: `variable_lookup_keys`
the correct controller name: `lookup_keys`

- the same applies during loading the bookmarks.

Version-Release number of selected component (if applicable):
6.2.0 Snap4

How reproducible:
always

Steps to Reproduce:
1. create some parameterized puppet class (in order to get the search bar on the smart variables page)
2. navigate to smart variables
3. try to create a bookmark (you can sniff the request header to see the controller paramter used)
4. try to create the same bookmark using hammer cli

Actual results:
invalid controller - variable_lookup_keys

Expected results:
lookup_keys controller is used, bookmark is created, bookmarks for smart variables are displayed in the dropdown

Additional info: