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.
diff --git a/src/version.c b/src/version.c
index 89068d8..fa42ac2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1425,
+/**/
     1424,
 /**/
     1423,