patch 9.0.1287: with the Kitty key protocl Esc with NumLock cannot be mapped

Problem:    With the Kitty key protocl Esc with NumLock cannot be mapped.
Solution:   Also use K_ESC when there is a modifier. (closes #11811)

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1287,
 /**/
     1286,
 /**/