Validation message text overflows its background in Shader Graph Custom Function node

Steps to reproduce:

1. Create a new project using Universal 3D template
2. Create and open any Shader Graph
3. Right-click > Create Node > Custom Function
4. Select the created node
5. In the Graph Inspector, in Node Settings, add a list item to the Outputs list
6. Observe an error/warning appears next to the Custom Function
7. Hover over the error and observe the text

Actual results: The red validation text (specifically "referenced") extends past / overlaps the bounds of its background bar, making the message appear to overflow its expected container

Expected results: The red validation text is fully contained within its dark background bar; the background resizes to fit the entire message and no text overlaps surrounding UI

Reproducible with versions: 6000.3.0b5, 6000.3.7f1, 6000.4.0b8, 6000.5.0a6

Not reproducible with versions: 6000.0.67f1, 6000.3.0b4

Tested on (OS): Windows 11, macOS 26.2