[Merge] lp:~artmello/gallery-app/gallery-app-improve_albumviewer into lp:gallery-app

[Bill Filler]

Review: Needs Fixing

Seeing some problems:
1) after creating an album, opening it and navigating through it, pressing the back button on the toolbar takes up to 5 seconds to display the Album overview page. 

2) Open an existing album (with at least 2 pages of pictures) and navigate to a certain page. Then press the Add button from the toolbar and add 1 or 2 more photos. After pressing the "Add to Album" button the album is shown again on the last page you were viewing. The new pictures seem to get added to the album either at the beginning of the album or wherever they can fit. Instead it should do this:
- Always add the new photo(s) at the end of the album
- Display the page where the new photos were added in the album after returning from "Add to Album"
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https://code.launchpad.net/~artmello/gallery-app/gallery-app-improve_albumviewer/+merge/222194
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