Position the draggable element by it's right offset instead of it's left

...because when a battle room is opened, the left side moves but the right doesn't,
so we have to use the right side to keep the element in the same location.
Only use this.updates to check if there is an update; use this.info to access the actual information
Reduce amount of page updates per tournament update
Remember to clear updates object when the tournament ends
Minor reordering of some updates
Show challenging as tournament status
Add support for popping out the tournament bracket