Skwibl minor fixes.

[dmitry-solomadin]

• Firefox has strage on-click style for room buttons. Remove.
• Ctrl(cmd)+enter should send comment message.
• Make all text areas non-resizable in room.

[yuri-karadzhov]

Ctrl+Enter does not work for right control (it important because it is the usual way people use it)

[dmitry-solomadin]

Works for me with right control on my mac and on windows machine.