problem

The search window can be moved outside of the viewport, therefore the header can't be reached anymore by the user to move the window back into viewport

solution

Fix user state handling so that a window with negative Y is saved with Y = 0, and restrict movable windows to the viewport with constrainHeader: true. The last step must be done for each window separately, or the search window its fixed.

additional fixes

Also fixed logged configuration changes, always showing old value the system value instead the overwritten level value