fix popup actions

[TimPurdum]

Closes #207
The view.popup.on function is not available until the view is rendered. Rather than do some sort of re-registration of the popupTemplate, I realized we could use a reactiveUtils.once to register the handler after the popup is ready.

Also in this PR

• A few undefineds added to a jsBuilder to prevent null errors
• Had to update the copyAssets.ps1. Powershell's default behavior seems to have changed. Christopher and I saw this before, now my version matches what his Mac was doing 3 months ago...
• removed an old project reference from the solution file

[AndersenBell]

https://developers.arcgis.com/javascript/latest/api-reference/esri-rest-support-Query.html#units

The default value is null per the API?

[AndersenBell]

Same here, default value is null:
https://developers.arcgis.com/javascript/latest/api-reference/esri-rest-support-Query.html#outFields

[TimPurdum]

Yes, I haven't actually improved anything here, but I also didn't hurt anything. I think I made this change as part of an investigation into an issue, and it seemed to make more sense to me to keep it undefined as more consistent.

[AndersenBell]

Just a couple comments on the default values that got updated.

[seahro]

Looks good. I had one question about possibly adding a note in the reactiveUtils or popup documentation about this method

[agnesstelmach]

TypeScript looks good to me :)

[TimPurdum]

Looks good. I had one question about possibly adding a note in the reactiveUtils or popup documentation about this method
@seahro I don't think your actual question came through. However, I've been going off the thought that only the C# layer needs documentation, but that was for the public-facing customer. We can certainly add comments for the internal maintainers. I'll see about adding one here.