Made frames_highlight_frame only work if KeyboardCtl=yes

c/Frames

@@ -1861,7 +1861,8 @@ static browser_data * frames_find_previous_frame(browser_data * check, browser_d
 /* removed by a NULL poll timer.                 */
 /*                                               */
 /* Currently, the highlight will not move with   */
-/* the parent browser window.                    */
+/* the parent browser window and will only show  */
+/* if keyboard control is enabled.               */
 /*                                               */
 /* Parameters: Pointer to a browser_data struct  */
 /*             relevant to the frame to be       */
@@ -1876,6 +1877,12 @@ _kernel_oserror * frames_highlight_frame(browser_data * b)
   _kernel_oserror         * e;
   BBox                      top, bottom, left, right;
 
+  /* Don't do anything if not using keyboard control */
+
+  if (!choices.keyboardctl) return NULL;
+
+  /* Otherwise, proceed */
+
   if (!ancestor) ancestor = b;
 
   s.window_handle = b->window_handle;