fix #2036: check if the fragment is added
Merge pull request #2060 from wordpress-mobile/issue/2036-ise-showusernameerror

fix #2036: check if the fragment is added
Reduced drawer divider margin and header size
List position is now restored upon rotation
Merge pull request #2064 from wordpress-mobile/issue/2062-drawer-scrolling

issue/2062-drawer-scrolling
Merge pull request #2065 from wordpress-mobile/issue/2063-reader-restore-position

issue/2063-reader-restore-position
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
Merge branch 'release/3.5' of https://github.com/wordpress-mobile/WordPress-Android into issue/2050-fab-shadow
Minor cleanup