Add delete folder button to web UI
Revert modifications to `getParentAndGrandparent`
Redirect to correct root path when deleting keys
Clean up root check
Transition to nearest parent on key delete
Drop duplicate isLoading set to false
Rename `KvHelpController` to `KvBaseController`
Merge pull request #124 from tiwilliam/delete-folders

Add delete folder button to web UI