- Shorten public/private reply menu items and make consistent
- Disable public reply to a private message in menus
- Hide unimplemented 'delete read messages' and 'delete all messages' menu items
- Don't display 'last post' times in the 'find forums' popup when we only store dates in the DB
- Rename browse-all-forums tab
- Add another Composite to AttachmentPreview in prep for showing text attachments too
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