**System Information**
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1650/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.79
**Blender Version**
Broken: version: 2.92.0 Alpha, branch: master, commit date: 2020-12-11 22:08, hash: `rB0c1d4769235c`
Worked: (newest version of Blender that worked as expected)
**Short description of error**
I've tried to save file with CTRL+S and by accident pressed my LMB on a viewport. Because of that mistake, I pasted object in my scene, instead of pasting file name in "Blender File View" window. So I tapped CTRL+Z (while still being active in a viewport) and whole panel with buttons "Save file", "Cancel" in "Blender File View" window disappeared. I've tested this on a completely new empty blender file. Pressing on a viewport didn't recreate that effect (probably, because nothing was there). But pressing on outliner or timeline have the same issue.
**Exact steps for others to reproduce the error**
- Open Blender
- CTRL+S{F9503981}
- Press LMB on an Outliner
- CTRL+Z