patch 8.1.1425: win_execute() does not set window pointers properly

Problem:    Win_execute() does not set window pointers properly.
Solution:   Use switch_win_noblock().  Also execute autocommands in a popup
            window.

src/version.c

@@ -767,6 +767,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1425,
 /**/
     1424,
 /**/