Fix for deprecated UIWebViewBounce config
Thumbnails were not updating and the faves models weren't being saved

Make sure to update the preview_48 attar as well as save it to localStorage
Cache busting filetransfer downloads
Cache busting filetransfer downloads
Merge pull request #577 from SpiderOak/issue-527-favorite-thumbnails-do-not-update

Thumbnails were not updating and the faves models weren't being saved
Merge branch 'master' into issue-537-filenames-with-colons