Bug 1064515 - update learn more link for sponsored tiles overlay [r=adw]
Bug 1071822 - update the learn more link in the tiles intro popup [r=adw]
Add a separate const for separate links.
Bug 1059591 - Incorrectly formatted remotely hosted links causes new tab to be empty [r=adw]
Use catch handler of promises to default to empty array on exceptions.
Bug 1071088 - Hover-area is cut off at the bottom of the tiles [r=adw]
Use the same hover css selector as others for title/shadow/border.
Bug 1070022 - Improve Contrast of Text on New Tab Page [r=adw]