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.
Do the extension check first.
Updated LocationHorizontalAccuracyThreshold to be 100 meters.
Check passed URL for photon. Return unchanged if found.
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.
Merge pull request #2017 from wordpress-mobile/issue/1969-location-accuracy-threshold

Updated LocationHorizontalAccuracyThreshold to be 100 meters.
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
Gets number of matches instead of array of matches.

Returns composed URL vs assigning back to argument variable.
Merge pull request #2018 from wordpress-mobile/issues/2013-do-not-photon-photon

Issues/2013 do not photon photon
Reader images preloading bug fix because of false if-check
Preloading reader images now uses the right indexPath