Prostream update - week 51.2

Release #68

Issue resolved: Messages to groups

Due to a bug, messages sent to a group were not showing up in the recipient's inbox. That has been resolved.

Issue resolved: User named

No notification was sent when a user was mentioned in a message. That's happening again now.

Issue resolved: Metadata with a new version

When you tried to upload a new version of a file and add metadata that had not been added to previous versions of the file, the upload screen would freeze and the metadata would disappear. This has been resolved and is now working fine again.