Description of the Issue

When attempting to quit Notepad++ with a project workspace that has unsaved changes, a prompt appears to ask you if you want to save. If you say Yes, you are presented with a FileSave dialog. If you cancel this dialog you will lose the opportunity to save your changes, and Notepad++ exits (but it is nice in that it informs you).

Steps to Reproduce the Issue

1. Start with no Project panels open and only a single new 1 tab open that is blue (no mods).
2. Open a Project panel, e.g. Project 2, via View menu > Project > Project Panel 2 to see:
   
3. Rightclick the word Workspace and choose Add New Project :
   
4. Accept the default value of "Project Name" to see:
   
   Note that the workspace icon has turned red, indicating unsaved changes.
5. Attempt to exit N++ by clicking the main window's X in the upper right corner. N++ will prompt you:
   
6. Click Yes
7. A FileSave dialog appears and has two buttons Save and Cancel.
8. Press Cancel.
9. N++ displays:
   
10. Press OK

Actual Behavior

Notepad++ exits

Expected Behavior

I expected Notepad++ to continue running, so that I could save my workspace changes at some future point in time, and not lose them.

For illustration of correct behavior, note what happens in a similar situation when you have a modified tab:
If your settings are such that if you have a red new 1 file and you attempt to quit N++, you will see:

If you click Yes you are presented with a FileSave dialog appears and has two buttons Save and Cancel.
If you then press Cancel N++ does not exit, giving you the opportunity to still save the changes to this file.

Debug Information

Notepad++ v7.9.3 (64-bit)
Build time : Feb 14 2021 - 03:15:58
Path : C:...........\npp.7.9.3.portable.x64\notepad++.exe
Admin mode : OFF
Local Conf mode : ON
OS Name : Windows 10 Enterprise (64-bit)
OS Version : 1909
OS Build : 18363.1316
Current ANSI codepage : 1252
Plugins : mimeTools.dll NppConverter.dll NppExport.dll