Selection stuck after saving scene

[KoBeWi]

Tested versions

4.3

System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 31.0.15.4633) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

Issue description

When you are selecting something and save the scene, the progress dialog breaks selection. Releasing mouse does not stop selecting, you need to click.

wkwL4bWHnh.mp4

In 3D it's worse, because selection freezes.

bRd6v7EVvH.mp4

Steps to reproduce

1. Open 2D or 3D editor
2. Hold LMB to select
3. Press Ctrl+S
4. Release mouse

Minimal reproduction project (MRP)

N/A