up the trim message count to keep 200 messages per room
up the room message initial load to 50 messages for larger screens
Merge pull request #775 from davidfowl/smoore/m/message-counts

increase a few message counts
Merge pull request #774 from DavidChristiansen/Design-ResponsiveMessageBox

Making messagebox as responsive as message and user list.
User detail layout responsiveness
Navigation width fix
Internet Explorer compatibility fix