Search dialog freeze on long search run

[informatorius]

Description of the Issue

When open notepad++ search dialog and do a search in files which may take longer time then search dialog freezes

Steps to Reproduce the Issue

1. open notepad++ search dialog
2. do search in files on disk with many files

Expected Behavior

1. search dialog should be busy and maybe offer a cancel search button
2. but other Notepad++ windows should be still working

Actual Behavior

1. search dialog freezes on long search run with no option to cancel
2. input fields of search dialog become empty
3. Notepad++ all windows also frozen

Debug Information

Notepad++ v8.5.3 (64-bit)
Build time : May 15 2023 - 06:09:36
Path : C:\Program Files\Notepad++\notepad++.exe
Command Line :
Admin mode : ON
Local Conf mode : OFF
Cloud Config : OFF
OS Name : Windows 10 Enterprise (64-bit)
OS Version : 21H2
OS Build : 19044.2728
Current ANSI codepage : 1252
Plugins :
ComparePlus (1.1)
MarkdownViewerPlusPlus (0.8.2)
mimeTools (2.9)
NppConverter (4.5)
NppExport (0.4)

[alankilborn]

If you want to see it as an enhancement, that's fine to want.
But it is not considered a defect as N++ is single-threaded and that's just what happens currently.
Probably not a high priority for developers.

[informatorius]

There is now a "find in files progress..." dialog but it gets hidden behind notepad++ window because it is not topmost.

Similar issue #13730