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 !
Do we want to name the variable `$this` or something more explicit, such as `currentShape`? I think this could clear up the functionality of this code a little bit when we look back on it later, but I'm certainly open to keeping it as `$this` to if it the notation helps us execute certain code which I may not be aware of.