verbeeckjan

Fixes the issue described here: https://github.com/mapbox/mapbox-gl-draw/issues/850 Allows for compatibility with angular 6+ by changing the way mapbox-gl-draw is imported. I'm not sure if this is the best way to fix...

Like the title says. It would be useful to copy Android's scrolling tabs functionality. Issue #47 would also be able to fix this but might take more time to implement....