Header: Adds buttons to the toolbar view and creates a template for the
overview panel

Adds two buttons to the toolbar view: "New Game" and "Modify Game".

Reported-by: bnurbekov, cgwalker, swconley, eVulmaNn
Signed-off-by: Batyrlan Nurbekov <bnurbekov@wpi.edu>
Merge branch 'sbl-dev' of github.com:bnurbekov/wpi-suite into sbl-dev