Adding interfaces to components should be easier (#328)
Adding an interface to a component in a way that looks nice requires several steps:
1) drag interface from toolbar next to the component
2) add association from interface to component
3) move interface, component and association around until the association is a straigth line and looks nice
4) (not possible yet - see my bug report) if required, move text so the association line is not above the text
This should be simplified so that it requires just one step and looks nice by default. For example, if I drag an interface from the toolbar onto a component, it should add the interface and create an association between interface and component in a single step.