remove unused code
fix #1100: start the progress bar when add category action is called
code style
fix #1330: autosave last used blog and action and restore them onCreate
code style
Merge pull request #1349 from wordpress-mobile/issue/1330-share-intent-receiver-default-last-used

fix #1330 share intent receiver default last used
Merge pull request #1348 from wordpress-mobile/issue/1100-new-category-starts-progress-bar

fix #1100: start the progress bar when add category action is called
Merge branch 'develop' of https://github.com/wordpress-mobile/WordPress-Android into feature/reader-discovery