OS: Windows 10 - 64bit
Quick search no longer filters the files when closing XnView's settings.
Effect: Wrong behaviour (quick search no longer filters also filter is still specified)
To reproduce:
1. Browse a folder with multiple image files.
2. In "Quick search" field enter "zzz". --> No thumbnails are displayed anymore.
3. Open settings using "Tools > Settings.." menu.
4. Close settings using "Esc" or "Cancel" button.
Actual behaviour (bug): All files in the folder can be seen. Quick search is no longer applied.

Expected behaviour: Quick search should be still applied when closing "Settings" dialog. (Alternatively, the Quick search field could be emptied.)