Move OEControllerDescription setup into OEDeviceHandler class instead so it can be customized by subclasses.
Ensure system specific filters are not overwritten on launch
Save and restore library scroll position and selection. Fixes #344
Fixed a bug with image thumbnail generation
The thumbnail size in pixels was compared with the point size of the original image
Initialize dictionaries in OEControllerDescription
Merge remote-tracking branch 'upstream/master'