Description of problem:
I swear this has been reported already but I didn't see an open bug, so it might be a regression....?

Attempting to create a repo with a multibyte name fails.  Clicking create once gives a spinner and then the Add Repo button is mysteriously re-enabled. Clicking it once more gives a notification that it was successful, but browsing the repo tree shows no repo.

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


How reproducible:


Steps to Reproduce:
1.  Create a new provider and product.
2.  Within the product, attempt to create a repo, 饺子. 
3.  Hit the Add Repository button; view results.
4.  Hit the Add Repository button a second time; view results.  
5.  Expand the product tree

Actual results:
* The first time it is clicked, the button is disabled, the spinner appears, and then the button is re-enabled. User is given no notification.
* The second time it is clicked, the user is given a notification that it was successfully created, but expanding the tree shows no such repo

Expected results:

Valid creation and/or notification and/or rejection of possibly invalid (??) repo names.

Additional info: