Dropdown property is cut off and adds unnecessary side padding when a Sub Graph is used as a node in Shader Graph

Steps to reproduce:

1. Create a new project using Universal 3D template
2. Go to Assets > Create > Shader Graph > Sub Graph
3. Open the created Sub Graph and in the Blackboard click "+" and select Dropdown
4. Drag the Dropdown property into the Shader Graph Window
5. Create any Shader Graph (e.g. Assets > Create > Shader Graph > URP > Lit Shader Graph)
6. Drag the Sub Graph from the Project Window into the Shader Graph
7. Observe the Dropdown property in the "New Shader Sub Graph" Node

Actual results: The Dropdown property is visually cut off and introduces an unnecessary column of empty space between the Material preview and the node edges

Expected results: The Dropdown property is fully visible and the Material preview extends to the node edges without additional side padding

Reproducible with versions: 6000.0.52f1, 6000.0.68f1, 6000.3.9f1, 6000.4.0b9, 6000.5.0a7

Not reproducible with versions: 6000.0.51f1

Tested on (OS): macOS 26.2

Notes:

• The unnecessary space is not regression and was always there, regression is regarding the cut off property
• For regression when downgrading/upgrading, with each reproduction the Sub Graph has to be deleted and dragged again into Shader Graph as sometimes it can not reproduce