Update Firefox OS tablet css styles and maps icon bug 878871

This PR includes fixes and updates for:

* Have it all maps icon was not the same in the nav as in body.

Updates for tablet portrait (touch) styles:

* Fixed "useful links" widths that we're causing extra space along the right hand edge of the window.
* Added supporting app icons for 'Moments with Friends' section in Have-it-All.
* Adjust right hand positioning of have-it-all screen shots as they we're being cut off slightly.