Bug 1024745 - [Vertical Homescreen] Marketplace app shows the default icon if the download has been paused

https://bugzilla.mozilla.org/show_bug.cgi?id=1024745

gaia-try: https://tbpl.mozilla.org/?tree=Gaia-Try&showall=1&rev=b847ba14613e
more recent gaia-try: https://tbpl.mozilla.org/?tree=Gaia-Try&showall=1&rev=b5a9ebbb1f10