Fix NPE in ReaderCommentList.onDestroy()
Check for null updatedPost after toggling like
Added same null check to CommentDetailFragment & ViewPostFragment
Merge pull request #2070 from wordpress-mobile/issue/2067-reader-comments-ondestroy-npe

issue/2067-reader-comments-ondestroy-npe
Merge pull request #2071 from wordpress-mobile/issue/2068-reader-post-like-npe

issue/2068-reader-post-like-npe
fix #2072: replace the call to getBestDateTimePattern
use the spinner date picker for API >= 21 (because the new mode doesn't fork correctly inside a ScrollView)
Merge pull request #2075 from wordpress-mobile/issue/2072-alternative-to-getBestDateTimePattern

fix #2072 alternative to get best date time pattern
Use a circular shape drawable as the background of the moderating progress view.

Fixes #2078
Merge pull request #2079 from wordpress-mobile/issue/2078-notifications-rounded-progress

Use a circular shape drawable as the background of the moderating progress view