GPII-123: Added hover font-icon states to the Discovery Tool. Added some missing styles for hover of panels.
GPII-132: Changed markup implementation from using Button to Checkbox input. Todo: fix hover styles.
Merge branch 'master' into GPII-132
GPII-132: Changed the Discovery Tool preset icons to use checkboxes instead of button.
Merge remote-tracking branch 'jhung/GPII-132' into GPII-125