Window title bar doesn't appear

Hello!

Description of the Issue

I use Notepad++ Window on the top of the screen.
When I go to Configurations/Preferences... it opens a new window where I configure everything. But since Notepad++ is already on the top of the screen, the window that open doesn't show it's top. I can't see the title bar and I can't move the window.

Steps to Reproduce the Issue

1. Put the Notepad++ window on the top of the screen
2. Open Configurations/Preferences...
3. Can't move the window

Expected Behavior

I was waiting for the Preferences window to open entirely on the screen, so I could use it properly.

Actual Behavior

The top of the window doesn't apper on the screen.

Debug Information

Notepad++ v7.8.6 (64-bit)
Build time : Apr 21 2020 - 15:23:03
Path : C:\Program Files\Notepad++\notepad++.exe
Admin mode : OFF
Local Conf mode : OFF
OS Name : Windows 10 Pro (64-bit)
OS Version : 1909
OS Build : 18363.836
Plugins : DSpellCheck.dll mimeTools.dll NppConverter.dll NppExport.dll

That's my favourite software.
I'm including a screenshot.

No source file or test is named. First reproduce the Preferences dialog placement with the main window at the screen's top edge on the reported Windows setup; done means the dialog opens fully on-screen with a visible, movable title bar.