Implemented the skeleton JPopupMenu classes, and the code to open them
Actualy added the classes
Implemented the PopupMenu classes, and added code to display them when right clicking in tree view, however it only works on Iterations
Popup menus are now working, and support multiselect, there is no checking to see if tab is already open though
Moved checking to see if requirement / iteration are opened to the tab controller
Merge branch 'dev-set3-popupmenu' of github.com:333fred/wpi-suite-tng into dev-set3-iteration4