Fixing background color on create account screen.
Removing incorrect analytics for sharing.

Was incorrectly flagging:
* Adding an item to Reading List.
* Copying an item's link.
* Opening an item in Safari.
Do the extension check first.
Check passed URL for photon. Return unchanged if found.
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.
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
Merge pull request #2030 from wordpress-mobile/issues/2029-fix-preloading-reader-images

Issues/2029 fix preloading reader images
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.
Moved placement of constant declarations in WordPressAppDelegate.h
Added [WPAnalytics refreshMetadata].

Calling this method allows each analytics tracker the option to
refresh any metadata they may be collecting about the app. This can be
called in response to events in the app that may change the metadata
such as a login or a logout.
Forcing analytics to refresh metadata on sign in.
Merge pull request #2041 from wordpress-mobile/issue/1767-open-push-to-notifications

Open push to notifications tab