Clearer improve proposal - All Voting UX more consistent

 - Redesigned Improve Proposal to show original proposal + edit box for better UX per user feedback.

 - Better formatting for all voting functions, making all consistent: New, Improve, Support, Edit.

 - Made Proposal and vote comment CSS improvements, padding, etc

 - Added "required" alert icon to make it more clear what's required

 - Better alert clearning