Restructure flow nodes components

Conceptually I think the parent and child nodes are the same, both have a title, both have attributes and both (can) have children. Then shouldn't the components also be the same?

I thought about it and it might be possible to create a "base node" that includes the simple stuff:
* Header
* Attributes
* Children

If any deviation should be made (not sure for what) it could be extended.

To solve the connections, a position on the canvas and being drag-able, there could be made a wrapper, not necessarily as parent, but it would have the extra elements that the parent would normally have.

If it is not clear, I'll happily explain it in more detail.