Blackboard and Inspector in the Behavior Graph window has buttons that are outside their bounds and flicker when resizing a docked Behavior Graph window

Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Install the Behavior package (com.unity.behavior)
3. Create a new Behavior Graph (Assets > Create > Behavior > Behavior Graph)
4. Open the newly created Behavior Graph
5. Dock the Behavior Graph window
6. Observe the Blackboard and the Inspector in the Behavior Graph
7. Resize the docked Behavior Graph window
8. Repeat step 6

Actual results: Blackboard and Inspector in the Behavior Graph window has buttons that are outside their bounds and flicker when resizing a docked Behavior Graph window

Expected results: Blackboard and Inspector buttons remain in their bounds and the Blackboard and the Inspector overlays do not flicker when the Behavior Graph window is resized

Reproducible with versions: 1.0.13 (6000.0.61f1, 6000.2.10f1, 6000.3.0b9, 6000.4.0a4)

Tested on (OS): MacOS Silicon Sequoia 15.6.1, Windows 11

Notes:

• The Blackboard and Inspector window buttons remain outside the bounds even after undocking the Behavior Graph window