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/version.c b/src/version.c
index cbfee04..5061579 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1652,
+/**/
     1651,
 /**/
     1650,