Implement resize on editable drag on 'path' type layout shapes

[etpinard]

Follow up issue after @n-riesco 's #660.

Foundations in #660 (comment)

[gvwilson]

Hi - this issue has been sitting for a while, so as part of our effort to tidy up our public repositories I'm going to close it. If it's still a concern, we'd be grateful if you could open a new issue (with a short reproducible example if appropriate) so that we can add it to our stack. Cheers - @gvwilson