## Bug description

Sites built with Tailwind use a lot of classes like: `text-base leading-6 font-medium text-gray-500 hover:text-gray-900 focus:outline-none focus:text-gray-900 transition ease-in-out duration-150` 

The problem is with the ones that have a colon (`:`) inside them. Simmerjs crashes with the following:

```
Failed to execute 'querySelectorAll' on 'Document': 'A.text-base.leading-6.text-gray-400.hover:text-gray-500.hover:text-white' is not a valid selector
```

... bringing down the entire toolbar.

## Expected behavior

The toolbar shouldn't crash when your page contains a CSS class with a colon in it.

https://stackoverflow.com/questions/45110893/select-elements-by-attributes-with-colon

## How to reproduce

1. Make a page with a `<button />` that has a class `with:colon`.
2. Wait for a few events to be captured or click the button yourself
3. Open the toolbar, click "heatmap" and watch it burst up in flames (and then crash)

posthog/test/test_event_model.py
def _signup_event(self, distinct_id: str):
        sign_up = Event.objects.create(
            distinct_id=distinct_id,
            team=self.team,
            event="$autocapture",
            elements=[Element(tag_name="button", text="Sign up!")],
        )
        return sign_up
    def _movie_event(self, distinct_id: str):
        event = Event.objects.create(
            distinct_id=distinct_id,
            team=self.team,
            event="$autocapture",
            elements=[
                Element(
                    tag_name="a",
                    attr_class=["watch_movie", "play"],
                    text="Watch now",
                    attr_id="something",
                    href="/movie",
                    order=0,
                ),
                Element(tag_name="div", href="/movie", order=1),
            ],
        )
        return event
    def test_simple_element_filters(self):