change default deck to single selection
fixes card selection bug
Merge branch 'dev-improveSessionInProgress' of github.com:Team-Combat-Wombat/wpi-suite-tcw into dev-improveSessionInProgress
fixes error for creating deck panel
Merge branch 'dev-improveSessionInProgress' of github.com:Team-Combat-Wombat/wpi-suite-tcw into dev-improveSessionInProgres

Adds back end for voting a requirement.