A right-click flow to fork gizmos

[mjtognetti]

A UI flow for forking gizmos and adding the forked gizmo to your launcher.

An example flow: pvh shares a chat gizmo with Orion. Orion wants his chat UI to have a hot pink background. Orion can right-click the gizmo, select the "fork" option, and a new gizmo appears in his launcher with a forked code/source doc and the same data doc. Orion can then modify the new gizmo however he likes without affecting pvh's original copy.

[pvh]

I've been working on writing gizmos and I keep running into questions -- how do I make a new gizmo? How would I modify an existing one? How do I get rid of one that I don't want anymore?

[mjtognetti]

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