When the "app" for a button is visible the button should become active.
Also clicking on a highlighted/active button should close the associated "app".
This should be noticeable on the following tablet apps.
* audio
* menu
* people
* market
* users
Now uses separate images for each state. Now tabletButtonProxy has 4 state properties, one for icon and images.
* icon
* hoverIcon
* activeIcon
* activeHoverIcon
* text
* hoverText
* activeText
* activeHoverText
Updated scripts to set new button states, if necessary.