Trying to set "Granular" permissions after "Block" is broken

[nemanjaglumac]

Describe the bug
Trying to set "Granular" permissions after "Block" leads to a table view that is greyed out.

Logs
N/A

To Reproduce
Steps to reproduce the behavior:

1. Go to /admin/permissions/data/database/1 (Permissions page for "Sample Dataset")
2. For "All users" group set permission to Block and save
3. Now change permissions to "Granular"
4. It will take you to "All users" group tabular permissions page
5. Note that everything is greyed out and the default values for data permissions are set to "Block"
   

Refreshing doesn't help.

The workaround is to click on the "Administrators" group in the left sidebar, and then to again click on the "All users" group. This time the page is editable, but it still displays "block".

Expected behavior
The page should be editable immediately and it probably makes more sense to default the sections to "no self-service".

Screenshots
Included above.

Information about your Metabase Installation:
local dev, `master, b4a41be, H2, sample dataset

Severity
Since there is a workaround, probably just P3. Would need to wait for an input from the product to figure out what the default permission level for granular tables should be.

[flamber]

Permissions are generally already difficult enough by themselves, so this can add a lot more confusion. Giving P2.

[nemanjaglumac]

@rlotun this was fixed in #17757 2 weeks ago and the repro was unskipped. Did you intentionally assign this to Cam for some additional BE work?

If not, we can close it.

[camsaul]

@nemanjaglumac I think is entirely an FE thing, Reza just assigned it to me because it was block-permissions-related.

Closing as fixed by #17757

[camsaul]

Fixed by #17757