Make error output collapsed by default (Was: Ugly output when clicking Stop Cell Execution)

[joaomoreno]

Testing microsoft/vscode#133905

1. Put a breakpoint
2. Start debugging
3. Click the stop button Stop Cell Execution

The cell output will contain a pretty large scary KeyboardInterrupt message.

[greazer]

Let's consider making the callstack collapsed by default. Some users may find the stack interesting, some may not. This would be true for ANY error that has a callstack.

[roblourens]

Meaning just collapse the output container? @DavidKutu I don't see how that fixes #7696

This would be true for ANY error that has a callstack.

I think errors coming from my code are pretty relevant, but an error from an interrupt is not very interesting

[DavidKutu]

It will help, but I guess its different enough

[roblourens]

@rebornix can we do anything here with the custom error renderer? Or would we want to detect this messy error and rewrite it in the jupyter extension?

[roblourens]

Like I think that just using a shorter line limit for this particular error would help, so the library frames get truncated off the end, but not sure where that logic would happen.

[amunger]

closing in favor of microsoft/vscode#200253