Fix stateful windows position does not work correct. See http://www.sencha.com/forum/showthread.php?249459-4.1.3-Stateful-window-position-is-STILL-incorrect and http://www.sencha.com/forum/showthread.php?223430-4.1.1-Window-getState-should-respect-the-floatParent-propert-of-a-window.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1171 3c3d7b80-5828-415e-9f61-280b98178fff