Sorting, Sabnzbd tests and Remote CDH support

Revised the Sorting logic in the UI.
Added several tests to verify Sabnzbd category configuration (including a check see if sorting is enabled in sab).
Added support to specify the local mount point for the category output folder, making it possible (for powerusers) to run sabnzbd/nzbget remotely while using Completed Download Handling.
This gets handled in the testing, no?