call initUIEvent with the correct view

[peterkogo]

What

We need to pass window to the UIEvent constructor otherwise event.view will be undefined in the emitted event.

Why

This should fix this erroneously closed issue.
We rely on event.view being defined inside React Flow. This would also fix issues with testing d3-drag.

How

Always pass view: window along with the init parameters.

Checklist

• [N/A] Documentation
• Tests
• Ready to be merged

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[snowystinger]

Logged a bug against Chrome https://issues.chromium.org/issues/545322457
Once that's been addressed we can move forward with this issue.

microsoft/fluentui#20022 (comment) suggests that this should be fixed at the jsdom level. I'm not entirely sure yet if I agree. jsdom doesn't deal in trusted events (except for focus/blur, i'm not sure why), and only in trusted events is the view set according to the spec.

User event would be the level at which to set trusted, but I think that's likely a large undertaking and isn't something I wish to take on right now. But adding the view at this level does seem correct as we can think of the user event flows as trusted.

If you'd like to open an issue with jsdom, we could see what they have to say as well. I've pushed some tests for this that I was working on while getting up to speed.