Toggling localization flags in a portlet's email notifications Content field throws TypeErrors

• Type: Regression Bug
• Status: Closed
• Resolution: No Longer Reproducible
• Affects Version/s: 7.0.0 Alpha 2
• Fix Version/s: 7.0.0 Alpha 2
• Component/s: ~ [Archived] Frontend Infrastructure
• Labels:
  • EXP7
• Fix Priority: 4
• Browsers:
  Firefox 22

Steps to reproduce:

1. Navigate to Sign In portlet > Cog > Configuration > Password Changed Notification
2. Toggle the localization flags below the Content textarea

Expected result:
The language will toggle without any errors.

Actual result:
Toggling doesn't work, and the browser throws TypeError: s is undefined and TypeError: a is null