prevents left and right keydown in input fields

If input field is in focus, keydown event to trigger navigation change should
not fire. User should expect cursor to stay in input field when using arrow keys.

Author: shelane

static/js/learn.js

@@ -223,6 +223,13 @@ jQuery(document).ready(function() {
         });
     });
 
+    jQuery('input').keydown(function (e) {
+         //  left and right arrow keys
+         if (e.which == '37' || e.which == '39') {
+             e.stopPropagation();
+         }
+     });
+    
     jQuery(document).keydown(function(e) {
       // prev links - left arrow key
       if(e.which == '37') {