[Cocoapsql-developer] Commit: isolated Query window and QueryWindowController for multi window behavior

[Olaf v. O. <ol...@ad...>]

Isolated the Query window and QueryWindowController for multi window 
behavior.

For the moment one can use only two Query windows.

Will fully separate all App methods and Query window methods into two 
different classes.
Will implement full multi window behavior.
Will add DbInspector (multiple) window.
Will change preferences to be able to hold more than one set of 
connection settings.

Olaf