Cleans up the editor's Blog object handling.
Removed an unnecessary file.  Code cleanup.
Several improvements to our new editor.
Several improvements to the code to handle saving posts.
Fixes some issues with the pages editor.
Fixed a logic error saving a removed post's context.
Merged from release/4.6
Merge pull request #2798 from wordpress-mobile/issue/385-content-cleared

Improves closing and saving posts in the new editor