patch 8.2.0770: cannot map CTRL-B when using the GUI

Problem:    Cannot map CTRL-B when using the GUI.
Solution:   Reset the CTRL modifier when used. (closes #6092)
diff --git a/src/version.c b/src/version.c
index a1b038f..2776504 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    770,
+/**/
     769,
 /**/
     768,