Messaging View Overhaul

This is the biggest push to date in terms of changes.
The PR addresses 7 issues in the workflow panel:

1. It fixes the conversation height issue, scrolling stops working bug on load
2. Conversation area height is also enlarged
3. It dynamically displays user initials in the conversation area
4. The options panel are hidden on mobile (mobile is conversation only)
5. Back home button has a slightly better styling
6. The conversation shapes are dynamically generated based on the number of participants and their colors

Check them out guys @psybuzz @nikilselvam !
Extra space between `)` and `{` here! This is another example of the spacing convention that isn't consistent in our codebase yet, but hopefully will be moving forward. If we can follow this convention for newly added code, then we can eventually go back and do one simple PR for all the code that doesn't follow this convention in order to get everything on the same page.