[#283] Shows list items that have preferences attached to them at the top when sorting.
Rows tagged with preferences should always sort to the top when sorting by Prefs
[#283] Rows with preferences now show up on top only when sorting using the Prefs column.
Merge pull request #400 from livathinos/283_sort_preferences

[Issue#283] Shows list items that have preferences at the top

This looks good, sorry for the delay reviewing it.