patch 8.2.3607: GTK3 screen updating is slow

Problem:    GTK3 screen updating is slow.
Solution:   Remove some of the GTK3-specific code. (closes #9052)
diff --git a/src/version.c b/src/version.c
index 94a8732..e0bc5c1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3607,
+/**/
     3606,
 /**/
     3605,