*Steps to reproduce:*

1. Create a EditorWindow with a TwoPaneSplitView with two children.

2. Set its viewDataKey to a non null string

3. Runt the Open the created EditorWindow

4. Resize the split view

5. From the window menu (at the top right corner of the window), select the "Reload Window" menu it.

*Actual results:* 

The geometries of the children is restored but the drag line element is at the wrong position.

*Expected results:* 

The geometries of the children is restored and the drag line element is at the right position (right edge of the first child).

*Reproducible with versions:* 

6000.0.23f1

*Not reproducible with versions:* 

*Can’t test with versions:* 

*Tested on (OS):* 

MacOS
*Notes:*
*