## 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 test_update_or_delete_action_steps(self):
        user_signed_up = Event.objects.create(event="user signed up", team=self.team)
        user_logged_in = Event.objects.create(event="user logged in", team=self.team)
        user_logged_out = Event.objects.create(event="user logged out", team=self.team)
        action = Action.objects.create(team=self.team, name="combined action")
        step1 = ActionStep.objects.create(action=action, event="user signed up")
        step2 = ActionStep.objects.create(action=action, event="user logged in")
        with self.assertNumQueries(6):
            action.calculate_events()
        self.assertEqual(
            [e for e in action.events.all().order_by("id")], [user_signed_up, user_logged_in],
        )
        
        step2.event = "user logged out"
        step2.save()
        with self.assertNumQueries(6):
            action.calculate_events()
        self.assertEqual(
            [e for e in action.events.all().order_by("id")], [user_signed_up, user_logged_out],
        )
        
        ActionStep.objects.filter(pk=step2.pk).delete()
        action.calculate_events()
        self.assertEqual([e for e in action.events.all().order_by("id")], [user_signed_up])
        ActionStep.objects.all().delete()
        action.calculate_events()
        self.assertEqual([e for e in action.events.all().order_by("id")], [])
    def test_save_with_person_property(self):