Text in catalog items is selectable. Fixes #535
Catalog views wording unified. Fixes #444
iScrubber cleanup. Fixes #533

The code is made to be as close to the original as possible with a
minor modification to bound the index upwards too (previously it was
only bottom-bound).
Direction selection for iScrubber. Fixes #533

Publication thumbnails use combined scrubbing direction that changes
depending on which side the user moved the mouse onto the thumbnails.