Feature request: Autofill list for CSS selectors in insight filters

[slshults]

Feature request

Is your feature request related to a problem?

When working on an insight, adding a filter for a CSS selector, I have use the browser's dev console or use the Toolbar to look over the UI to find the correct CSS selector I want to filter on.

Describe the solution you'd like

"It would be awesome if instead of blindly typing down exactly the CSS Selector to refer to an autocapture it would have a list with autocomplete to find the tag I'm looking for."

Describe alternatives you've considered

Toolbar

Additional context

From: https://posthoghelp.zendesk.com/agent/tickets/26060

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