* Fixed big memory leak and other minor memory leaks.
* Speed improvements:
* Make the preloader actually preload the images.
* Image overview: scale the image asynchronously.
* Faster execution for asynchronous tasks.
* Resize tool: fixed initial selection (Vaclav Brozek)
* Ensure the settings have been saved before exiting.
* Fixed possible crash when switching from the image viewer
to the video viewer.
New or updated application translations:
* Basque (Iñaki Larrañaga Murgoitio)
* Indonesian (Andika Triwidada)
