Added system settings for default sort params

It would be nice to be able to specify the default sortfield / sortdir via system settings. I added and tested the changes successfully so far as I'm able to sort the grid by what's entered in the system settings BUT the problem I have is, that now I cannot use the extjs grid sorting in the manager (manual sorting by the little arrow in the grid headers...) anymore^^...probably this change fixes something a little too hard...but I couldn't find the place to specify this in the extjs files (bc I basically suck at it) instead of the getlist processor...I'm sure you have a better solution for that John...

I also updated the lexicons, but make a separate PR for that because it could be used even if this PR is not merged (what I consider very possible due to the kind of breaking nature of it =D)