Adding a node does not send the width and height metadata, only on changenode

[ERnsTL]

Full description, reproduction instructions and screenshots:

• https://github.com/ERnsTL/flowd/issues/237#issuecomment-1289376512

• issue noticed there: https://github.com/ERnsTL/flowd/issues/237

According to message traces, the problem is noflo-ui side.

[ERnsTL]

note: not fixed on noflo-ui side (closing the issue flowd-side because what we could do from flowd side is done, but issue nflo-side remains!)

[ERnsTL]

Issue noflo-ui side remains:

To reproduce:

• connect to the runtime
• add a component, wire it up
• noflo-ui sends addnode message without the width and height in metadata.
• reload noflo-ui
• it reconnects to the runtime
• runtime retuns the width:null and height:null values.

Looks like this after addnode:

Looks like this after reload:

If there is a changenode event, then noflo-ui sends the width: 72, height: 72 but if there is no changenode event, then the data from addnode message remains, which is width: null, height: null.