fix #1227
fix #1221
fix #1222
fix #1223
fix #1224
fix #1225
Merge pull request #1228 from wordpress-mobile/issue/1227-misc-npe

fix #1227 and other NPEs
fix #1231: null check WordPress.currentPost
Merge pull request #1233 from wordpress-mobile/issue/1231-npe-viewpostfragment

fix #1231: null check WordPress.currentPost
fix #1239: fix media search button when it's visible in the action bar
fix #1236
Merge branch 'master' into develop
use mSearchView class member when getting the search view onCreateOptionsMenu
null check url
Merge pull request #1242 from wordpress-mobile/issue/1239-media-search-button

fix #1239: fix media search button when it's visible in the action bar
Merge pull request #1243 from wordpress-mobile/issue/1236-npe-themepreview

fix #1236
2.7.2 version bump
Merge branch 'develop' of github.com:wordpress-mobile/WordPress-Android into develop
Merge branch 'master' into develop