Improve formatting of Conversation List

[danry25]

The current conversation list has no visual boundary between conversations. This is not good at making an effective use of space.

It would also be good to:

• [x] - Color code conversations (color coded inbound and outbound messages in conversations)
• [x] - Lean on the FusionPBX contacts (and create contacts from CNAM data) to lookup contact names
• [x] #60
• [x] - Allow other users to access the messages sent to a given number
• [x] - Show the number you are sending texts as
• [ ] #54
• [x] #55
• [ ] - Enable templating of outbound messages #36
• [ ] #56
• [ ] #61
• [ ] #57
• [x] - Pick which outbound number you are sending as for extensions with multiple numbers assigned
• [x] - Add a left side bar with a list of conversations
• [x] #58
• [ ] #59

[dunkeltron]

Triaged and moved the non closed points to separate issues