Fixed PlanningPokerVote models

...
- Fixed RegEx in the EntityManager
- Added a card button listener to submit the vote to server

Reported-by: lhnguyenduc & bbiletch & ryanbaylorkillea
Signed-off by:
Long Nguyen Duc Hoang <lhnguyenduc@wpi.edu>
Ryan Killea <rbkillea@wpi.edu>
Barry Biletch <bbiletch@wpi.edu>