Fixing background color on create account screen.
Check that reblogging succeeded in success block.

Adds a failsafe to make sure reblogging was successful.
Replaces tabs with spaces.
Fix post settings photo popover position

Popover is now well centered after rotation
Removing incorrect analytics for sharing.

Was incorrectly flagging:
* Adding an item to Reading List.
* Copying an item's link.
* Opening an item in Safari.
Set post settings tableview as grouped
Code style
Pass around the NSManagedObjectID for a topic instead of an entity.
Convert tabs to spaces.
Let reader post detail and rebloging view controllers handle their own images.
Prime the share activity when its safe.

Avoid a visible performance hit later if scrolling.
Merge pull request #2005 from wordpress-mobile/issue/2004-fix-create-account-color

Fixing background color on create account screen.
Combining if statements as per @irbrad's suggestion.
Merge pull request #2011 from wordpress-mobile/issue/2010-remove-incorrect-sharing-tracking

Removing incorrect analytics for sharing.
Added Content-Security-Policy to the default preview HTML template
Updates no results view.

Shows "Fetching posts..." status and fixes an issue with the no posts message flickering briefly.
Do not sync reader if there is no account in the app.
Update provisioning profile to latest version for App Store
better handles cells for Helpshift enabled status
Hard coded the indexes for the application tabs.

`indexOfObject` was returning invalid values so the tab would never be selected.
Removed show[Name]Tab methods and replaced with `showTabForIndex` method.

Renamed tab index constants to use `k` naming convention and made the publicly accessible.