Fix some javascript errors in rare situations (#1490441)

Aleksander Machniak

2015-07-31 3d0747957ea8ad1d416aca4c175b0f523d1c5a08

 program/js/list.js

@@ -565,6 +565,10 @@
 */
click_row: function(e, id)
{
  // sanity check
  if (!id || !this.rows[id])
    return false;

  // don't do anything (another action processed before)
  if (!this.is_event_target(e))
    return true;