GPII-1014: Updated styling of exploration tool

Updated the styling of the exploration tool to work with the latest Infusion and normalize.
GPII-1014: removed old FSS class
GPII-1014: Adjusted width of textfield steppers
GPII-1014: Adjusting the headers in PMT.

Fixed the header size in PMT.
Merge remote-tracking branch 'justin/GPII-1014' into GPII-1014
GPII-1014: A couple of styling tweaks.
GPII-1014: Jshinted, added comments and a couple of fixes.
GPII-1014: Added the feature for the text field stepper to use up and down arrow keys to adjust its value. Also added the help hint of the new feature.
GPII-1014: Use number input fields for the value field in the text field stepper.
GPII-1014: Use more specific labels for the plus and minus buttons in text field steppers.