Description of problem:
If the user types an incorrect filename into the glossary upload file selector, the browser ends up on an invalid page
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Sign in as admin, click Glossary
2. Click Upload, then Choose File
3. enter a false filename into the selector, press Open
4. Press Upload
Browser shows "This web page has not been found"
Some kind of "invalid file" error in notification
Tested in Chrome. Firefox simply says "Glossary file sdfsdfsdfsf.po uploaded." without actually doing anything.
Migrated; check JIRA for bug status: http://zanata.atlassian.net/browse/ZNTA-401