Allow you to close tabs with an x or by right clicking on a tab and "Remove All" or "Remove Others". Also implements the validation method that checks to see if each tabs data has been saved. (This has not been implemented into any of the text fields yet).
Merge branch 'dev' of https://github.com/cs3733bdt/wpi-suite into dev

# By Jeffrey Signore
# Via Jeffrey Signore
* 'dev' of https://github.com/cs3733bdt/wpi-suite:
  Fixed table in active games view, added bottom placeholders for requirement and user story components. Jeffrey Signore