Make paths work for Events, not just pageviews

[timgl]

Is your feature request related to a problem? Please describe.

It'd be great if paths were generic.

There's 4 types of events we care about in paths

• $pageview, deduplicated on $current_url
• $screen, deduplicated on $screen
• $autocapture, deduplicated on elements_hash
• Anything that doesn't start with $, deduplicated on event name

It'd be great to show a combination of all four, or be able to tick on/off each individual category.

(not for this ticket, but worth keeping in mind:) ability to select a 'starting position', like a pageview with certain current_url.

[EDsCODE]

One more point to note that I may work into the related PR is that autocapture tags can be really sparsely detailed. " with text "sign up"" could be a label that happens across a sign up flow so without page context a user would be pretty confused what " with text "sign up"" => " with text "sign up"" => " with text "sign up"" event means