[FIX] Enable sorting and filtering for Status in Kloster list

This fix is quite ugly, if possible find a way to store model and displayed data separately white retaining binding.

Also, removed Bearbeitungsstatus from Kloster JSON. getOptions is now used for list selects as well.
Merge pull request #157 from subugoe/fixliststatus

[FIX] Enable sorting and filtering for Status in Kloster list