i made a new projekt to test it and there it works with normal panels.
but it confuses me that there the whole bar is shown on top of screen and then the normal bar at the position where i want it.

Maybe you can take a look or get an idea http://www.materialordner.de/l6So4EAXry0yHTau7juOae1iEgqhiJiv.html

another thing that i see is that if i create a background panel without windowparent and then a editbox without window parent i cant click into the editbox. What layers do i have to change?