patch 8.2.4490: terminal focus reporting only works for xterm-like terminals

Problem:    Terminal focus reporting only works for xterm-like terminals.
            (Jonathan Rascher)
Solution:   Remove the "focus_mode" flag. (closes #9859)
diff --git a/src/version.c b/src/version.c
index b212379..b73b260 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4490,
+/**/
     4489,
 /**/
     4488,