Working on ChatRoomManager.focusOnChatroom method.

ACE-61
- Added an id attribute to the div containing the chatroom-container
class.
- Added code to ChatRoomManager.js to add a chat room and apply focus
- Edited comment in ChatRoomManager.js
Make removeDom function inline; validate to and from of move function.

ACE-61
Merge pull request #29 from ualerts-org/OrderChatRooms_ACE-61

Order chat rooms ace 61