Material DropDowns and ListBoxes do not scroll to element when typing first letters and more than 1 are attached/visible

[andreififiita]

When multiple material DropDowns and ListBoxes are displayed in the same context, the type-to-search functionality is not working correctly: when typing, the element is found and highlighted, but the there is no scroll inside the dropdown elements list to place the element in view (this is an issue when a list has a lot of elements, for example a list of countries)

Example on GMD ListBox demo page:
https://gwtmaterialdesign.github.io/gmd-core-demo/#listbox

1. Access the link and Go to section "Empty Placeholder"
2. Click the listbox "Select your hero"
3. Press W to go to "Wolverine"

The "Wolverine" element is highlighted but the list is not scrolled to show that element.