patch 8.2.1649: GTK3: using old file chooser

Problem:    GTK3: using old file chooser.
Solution:   Use native file chooser on GTK 3.20 and above. (Yogeshwar
            Velingker, closes #6909)
diff --git a/src/version.c b/src/version.c
index 5632a9f..86cae2f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1649,
+/**/
     1648,
 /**/
     1647,