IconSet property in Drawer items

[RakouskyS]

Components like the Button have a property called 'iconSet' which in combination with 'icon' returns the right icon.
For the drawer items in section, you only have the 'icon' property which is missing lots of important icons.

Passing an component instead of a string as the icon produces a warning.

A solution to this would either be allowing an object to be passed in proptypes, or implement the iconSet exactly like on the button component.