How to reproduce:
1. In dual monitor setup set one monitor's scale to 125% (Right-click on desktop->Display Settings), and the other monitor's scale to 100%
2. Create a new Unity project
3. Move the Editor to the 125% scale monitor
4. Open the Package Manager (Window->Package Manager)
5. Move the Package Manager to the 100% scale monitor
6. Download ProBuilder package in Package Manager
7. Observe the import loading window on the Editor's monitor

Expected results: The loading bar fits correctly in the import window
Actual results: The loading bar is too long/short for the import window

Reproducible with: 2020.1.0a23, 2020.3.16f1, 2021.1.17f1, 2021.2.0b7, 2022.1.0a5
Not reproducible with: 2019.4.29f1, 2020.1.0a22

Notes:
- Depending on different scale differences some different results occur:
The loading bar is too short
The loading bar is too long (doesn't fit into the window)
The text is cut off and moved slightly on the loading bar
- I was not able to reproduce the issue with any other loading/import window