paper-submenu jumps to first element after scrolling down then selecting

[brian-cruickshank]

Please see paper-menu/issues/17 for a good description of this problem. I've found this occurring in v1.2.2 of the paper-menu component.

There is a two part fix:

• comment out the content of the _onFocus method in paper-submenu.html:

      /**
       * Handler that is called when the menu receives focus.
       *
       * @param {FocusEvent} event A focus event.
       */
      _onFocus: function(event) {
        // this.__trigger && this.__trigger.focus();
      }

• in iron-menu-behavior.html's _onFocus method, increase the async function delay to 150ms or more. See Race condition in _onFocus issue for more details.

[ktiedt]

Hitting this too, can we get some feeback, I am happy to convert this to a PR if the above fixes are acceptable and @brian-cruickshank doesnt have the extra cycles.

It is rather critical for us.

[ktiedt]

Ping? Still critical, even more so actually, because now more users are complaining about it.