Assign tagset tag to Case - pop-up is too small and tagset select is hidden

With the new "auto-sizing" jquery dialog, the Add Tags pop-up didn't provide enough vertical space to display the drop-down for selecting tagset tags. This is now fixed.

— original post —
Create a tagset - used for = Cases, title = "issues"
Add a tag for it (via admin ui) -> 'Birds'
Now go to an existing case, and click "Add Tags" button
Type in "bir" - you get searching, but no matching values
Finish typing in the string "birds" (or "Birds") and click Save
A "Change case tags" activity is added, but the case is not tagged.
Try again, typing in a new tag value ('Fish")
The new tag is not created in the tagset and is not assigned to the case.