Created attachment 808980 [details]
multiple-languages-same-user

Description of problem:
The list of notifications a user can see might consist of multiple languages
depending on which locale was selected at the time the notification was first
created. Notifications should be one language at a time. For example, if I
change my locale to "es" (Spanish), then the list of notifications available
to me should change to all Spanish rather than a mix of languages. 

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


How reproducible:

Steps to Reproduce:
1.Click user drop-down in upper, right-hand corner
2.Select "My Account"
3.Select user in left-hand column on screen
4.Change "preferred locale"
5.Go to notifications at /katello/notices#/!=
6.The new notification should appear in the selected language
7.Change locale again. Steps 1-6 should be the same except for language.

Actual results:
Notices may appear in several different languages or locales at the same time.

Expected results:
Notices change with change of locale.

Additional info:
I didn't try this with different users. If the bug happens with multiple users,
the impact would be greater.