patch 8.1.1453: popup window "moved" property not implemented yet

Problem:    Popup window "moved" property not implemented yet.
Solution:   Implement it.
diff --git a/src/globals.h b/src/globals.h
index 43ad8e9..4973d31 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -558,24 +558,25 @@
 EXTERN win_T	*firstwin;		/* first window */
 EXTERN win_T	*lastwin;		/* last window */
 EXTERN win_T	*prevwin INIT(= NULL);	/* previous window */
-# define ONE_WINDOW (firstwin == lastwin)
-# define W_NEXT(wp) ((wp)->w_next)
-# define FOR_ALL_WINDOWS(wp) for (wp = firstwin; wp != NULL; wp = wp->w_next)
-# define FOR_ALL_FRAMES(frp, first_frame) \
+#define ONE_WINDOW (firstwin == lastwin)
+#define W_NEXT(wp) ((wp)->w_next)
+#define FOR_ALL_WINDOWS(wp) for (wp = firstwin; wp != NULL; wp = wp->w_next)
+#define FOR_ALL_FRAMES(frp, first_frame) \
     for (frp = first_frame; frp != NULL; frp = frp->fr_next)
-# define FOR_ALL_TABPAGES(tp) for (tp = first_tabpage; tp != NULL; tp = tp->tp_next)
-# define FOR_ALL_WINDOWS_IN_TAB(tp, wp) \
+#define FOR_ALL_TABPAGES(tp) for (tp = first_tabpage; tp != NULL; tp = tp->tp_next)
+#define FOR_ALL_WINDOWS_IN_TAB(tp, wp) \
     for ((wp) = ((tp) == NULL || (tp) == curtab) \
 	    ? firstwin : (tp)->tp_firstwin; (wp); (wp) = (wp)->w_next)
 /*
  * When using this macro "break" only breaks out of the inner loop. Use "goto"
  * to break out of the tabpage loop.
  */
-# define FOR_ALL_TAB_WINDOWS(tp, wp) \
+#define FOR_ALL_TAB_WINDOWS(tp, wp) \
     for ((tp) = first_tabpage; (tp) != NULL; (tp) = (tp)->tp_next) \
 	for ((wp) = ((tp) == curtab) \
 		? firstwin : (tp)->tp_firstwin; (wp); (wp) = (wp)->w_next)
 
+
 EXTERN win_T	*curwin;	/* currently active window */
 
 EXTERN win_T	*aucmd_win;	/* window used in aucmd_prepbuf() */
@@ -1663,4 +1664,5 @@
 
 #ifdef FEAT_TEXT_PROP
 EXTERN int text_prop_frozen INIT(= 0);
+EXTERN int popup_visible INIT(= FALSE);
 #endif