## 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
Person.objects.create(distinct_ids=["whatever"], team=self.team)
        event1 = Event.objects.create(
            team=self.team,
            distinct_id="whatever",
            elements=[
                Element(tag_name="span", order=0),
                Element(tag_name="a", order=1, attributes={"data-id": "123"}),
            ],
        )
        event2 = Event.objects.create(
            team=self.team,
            distinct_id="whatever",
            elements=[Element(tag_name="button", order=0, attributes={"data-id": "123"})],
        )
        action1 = Action.objects.create(team=self.team)
        ActionStep.objects.create(action=action1, selector='a[data-id="123"]')
        action1.calculate_events()
        events = Event.objects.filter_by_action(action1)
        self.assertEqual(len(events), 1)
        self.assertEqual(events[0], event1)
    def test_filter_events_by_url(self):
        Person.objects.create(distinct_ids=["whatever"], team=self.team)
        action1 = Action.objects.create(team=self.team)
        ActionStep.objects.create(
            action=action1, url="https://posthog.com/feedback/123", url_matching=ActionStep.EXACT,
        )
        ActionStep.objects.create(action=action1, href="/a-url-2")