Reproduction steps:
1. Create a new 3D project
2. Open the Package Manager window (Window > Package Manager)
3. Open the Profiler window (Window > Analysis > Profiler)
4. Make sure both of those windows are undocked
5. Resize both of those windows
6. Close and re-open the Editor
7. Observe the floating windows

Expected result: The floating windows keep their sizes
Actual result: The floating windows go back to their default sizes

Reproducible with: 2021.3.36f1, 2022.3.22f1, 2023.2.15f1, 6000.0.0b12

Reproducible on: Ubuntu 23.10
Not reproducible on: Ubuntu 22.04, Windows 10

Notes:
- The Editor sometimes starts minimized when it was closed while being full screen
- 2021.3 - Few floating windows did keep their size (ex: Package Manager), but some did not (ex: Profiler)