Scroll the Thumbnail of the current page into view when exiting fullscreen mode
Store references as pngs and write failures to separate png files.
Merge pull request #2920 from Snuffleupagus/thumbnail-on-fullscreen-close

Scroll the Thumbnail of the current page into view when exiting fullscreen mode
Merge pull request #2935 from brendandahl/png-refs2

Store references as pngs and write failures to separate png files.