SSR id fix, Modal & Combobox RFC version

Bug Fixes

• Fix AutoId SSR issue and return children always, also on server but with empty string as id. #445

Modal, new component

• Add Modal dialog component with small screen and scrolling support. #444

Combobox

• Logic for controlled items
  • New props: controlledItems, onItemSelect and onRemoveAll
    (props names are subject to change)