Steps to reproduce:
1. Create new Unity project
2. Open Package Manager window
3. Install Behaviour package (com.unity.behavior)
4. In Project window create Behaviour Graph (Create > Behaviour > Behaviour Graph)
5. Open Behaviour Graph
6. In Behaviour Graph window > Inspector window press “Edit Subgraph Representation”
7. In “Edit Subgraph Representation” window click on the right bottom corner on resize indicator icon
8. Expand the description field as much as possible
9. Observe the “Edit Subgraph Representation” window

Actual results: “Edit Subgraph Representation” window can be expanded as much as possible, causing window to break, invisible line appears at the bottom of the window, “Confirm” button

Expected results:  “Edit Subgraph Representation” window resizing should be fixed, should not break the window

Reproducible with versions: 1.0.12 (6000.0.60f1, 6000.2.9f1, 6000.3.0b7, 6000.4.0a3)

Tested on (OS): Windows 11