Steps To Reproduce:

1. Create a new Project
2. Window > Package Manager>Shader Graph> Import
3. Project > Shader > Create Blank shader graph
4. Double click on the shader to open it in the editor
5. Shader Graph> Graph Inspector> Precision> Half
6. Move the mouse

Expected Result: The cursor moves away from the Graph Inspector window

Observed Result: The Graph Inspector window moves along with the cursor

Reproducible In: 2021.1.0b9, 2021.1.0b7

Not Reproducible In: 2021.2.0a7, 2020.2.2f1

Reproducible with package version 11.0.0

Note: Shader graph package is not available in 2021.1.0b6 and previous versions

Environment: Win and Mac