Fix building runtime editing example to standalone

[karl-]

https://fogbugz.unity3d.com/f/cases/1165683

Fixes issues when building the runtime editing example to a player.

• Missing references to materials and shaders
• An uninitialized lookup dictionary
• Add a readme for a common mistake (forgetting to disable script stripping)

[gabrielw-us]

Some issues, using 19.3.0b1 -

In the standalone build, click-drag on face just pans my camera
In the editor Play mode, click-drag works to move faces, but I see an enormous axis indicator

[karl-]

In the standalone build, click-drag on face just pans my camera

You have to disable "Script Stripping" in the ProBuilder preferences for this example to work. It's mentioned in the new readme.

In the editor Play mode, click-drag works to move faces, but I see an enormous axis indicator

✅

[gabrielw-us]

🤦‍♂ of course, and you just mentioned that the other day :D

re-checking 👍

[karl-]

@gabrielw-us c75908d sets a reasonable line width

[JoelFortin]

Looks good to me ... please make sure your last commit about the line size is really merged ... I don't know why but this changes wasn't there when I downloaded your branch ... I had to manually add the piece of code in Handles.cs script to make it works.

[JoelFortin]

Forget what I said about the script missing your changes ... just realized I used the scripts that was in the attached project and not your new version of the script from the package. Fire Away !!