patch 8.1.1652: GUI: popup window doesn't close on mouse movement

Problem:    GUI: popup window doesn't close on mouse movement. (Paul Jolly)
Solution:   Generate mouse-move events when a popup window is visible.
diff --git a/src/globals.h b/src/globals.h
index ddafcc1..3562b5e 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -603,6 +603,11 @@
 #ifdef FEAT_TEXT_PROP
 EXTERN win_T    *first_popupwin;		// first global popup window
 EXTERN win_T	*popup_dragwin INIT(= NULL);	// popup window being dragged
+
+// Set to TRUE if there is any visible popup.
+EXTERN int	popup_visible INIT(= FALSE);
+
+EXTERN int	text_prop_frozen INIT(= 0);
 #endif
 
 /*
@@ -1680,10 +1685,3 @@
 EXTERN int ctrl_break_was_pressed INIT(= FALSE);
 EXTERN HINSTANCE g_hinst INIT(= NULL);
 #endif
-
-#ifdef FEAT_TEXT_PROP
-EXTERN int text_prop_frozen INIT(= 0);
-
-// Set to TRUE if there is any visible popup.
-EXTERN int popup_visible INIT(= FALSE);
-#endif