Popup Windows not closing on Form click/move.

[dax-leo]

Problem description:

1. open combobox
   
2. We can move the form but combobox will stay open.
   

Maybe changing :

Modern.Forms/src/Modern.Forms/FormTitleBar.cs

Lines 105 to 112 in 20a1f06

	protected override void OnMouseDown (MouseEventArgs e)
	{
	base.OnMouseDown (e);
	// We won't get a MouseUp from the system for this, so don't capture the mouse
	Capture = false;
	FindForm ()?.BeginMoveDrag ();
	}

to :

protected override void OnMouseDown (MouseEventArgs e)
        {
            base.OnMouseDown (e);

            // Reset any popup left open
            FindForm ().adapter.SelectedControl?.Deselect ();
            FindForm ().adapter.SelectedControl?.Select ();

            // We won't get a MouseUp from the system for this, so don't capture the mouse
            Capture = false;
            FindForm ()?.BeginMoveDrag ();
        }

This way parent control (that is FindForm ().adapter.SelectedControl) will automatically trigger popup close.

[jpobst]

Should be fixed with #66. I tried to unify the code a bit with the existing mechanism that handles this for menus.