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Transifex (https://www.transifex.com/projects/p/xfce/).
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Disconnect the directory signal handler

When changing folders ensure we disconnect the old directory
monitor signal handler and always release the directory monitor.
Additionally, this patch removes a clip call in the icon view
as it's not required at all.
Additional default icon size setting
Fix for images not appearing in settings app (Bug 10685)

We need to add images to the list in the main thread and not our
worker thread. Otherwise images won't always display right away,
espeically when the system is under a high load.