Merge pull request #381 from mikeh/master

MOBILE-2900. MOBILE-2901
MOBILE-2904: Trying to display synced file in fullscreen doesn't display content
Merge pull request #382 from tmughal/master

MOBILE-2904
MOBILE-2902: Fix NSInvalidArgumentException in - [DownloadsViewController deleteDocumentFromDownloads:], line 307
Merge pull request #383 from tmughal/master

MOBILE-2902
MOBILE-2905: 2nd line of comments in tasks spills over buttons
- Also fixes an issue whereby some task attachment details were overwritten by the "No Attachments" label