Bug 933131 - Message report panel implementation

- Reuse the original group view contact list and make the panel into more general information page for showing group contact information and sender/receiver report information.
- New report view contained:
 - Message detail information(type/status/timestamps)
 - Contact list, it's similar to original group participant list, containing 2 more report option within contact li(If report is requested)
 - Message size (if message has attachment)