Description of the Issue

Problem: accidentally clicking "Replace All in All Opened Documents" ruins potentially all your text files, causing you to have to go through potentially hundreds of thousands of open text files and fix them one by one, and ruins them all permanently if you've closed Notepad++ in-between (#2855 #5253 #5260).

Previous topics on this feature were closed because "you can just fix them by going through them one by one, and clicking undo". This is akin to saying "you can just replace all in all opened documents, by going through them one by one and clicking replace all".

As the function is now admitted to be completely pointless, remove it entirely, it clutters the "replace" tool in Notepad++.

Steps to Reproduce the Issue

1. Open every file you've ever edited in Notepad++.
2. Delete original save files, keep files in editor. (This is how most people use Notepad++)
3. Ctrl+F.
4. Replace.
5. Check tickbox 'regular expression'.
6. Find what: [A-Za-z0-9]
7. Replace with: I shall not add one-click global file corrupting buttons to my program.
8. Hover mouse over 'replace all'.
9. Move mouse 1cm down.
10. Left click.
11. Close Notepad++.

Debug Information

Notepad++ v7.8.5 (32-bit)
Build time : Mar 4 2020 - 11:04:20
Path : E:\Notepad++\notepad++.exe
Admin mode : OFF
Local Conf mode : ON
OS Name : Windows 10 Home (64-bit)

OS Version : 1703
OS Build : 15063.674
Plugins : mimeTools.dll NppConverter.dll NppExport.dll

Screenshot has been modified.