How to reproduce:
1. Create a new project
2. Open the Package Manager window
3. Open UI Toolkit Debugger and select “Sidebar”
4. Change “min-width” and “width” to 100px
5. Close the Package Manager window
6. Open the Package Manager window

Expected result: All UI elements are visible
Actual result: Just the sidebar element is visible

Reproducible with: 2023.3.0a14, 2023.3.0b4
Not reproducible with: 2023.2.8f1, 2023.3.0a13
Could not test with: 2021.3.34f1, 2022.3.19f1 (no Sidebar in the UI Toolkit Debugger)

Reproduced on: macOS 14.2.1 (Intel)
Not reproducible on: No other environment tested

Note: not reproducible with 99px and 101px