Improve event properties display

[timgl]

Changes

• Makes URLs clickable
• Hide a handful of properties that aren't relevant (with option to show them, see toggle)
  
• Make an exception event red in the events list
  

Checklist

• All querysets/queries filter by Team (if this PR affects any querysets/queries)
• Backend tests (if this PR affects the backend)
• Cypress E2E tests (if this PR affects the front and/or backend)

[macobo]

Q: I think lodash would clean things up a lot here, would it make sense to introduce it?

import { omit, pick, keys } from 'lodash' 

const hideableKeys = pick(keys(event.properties), (key) => keyMapping[key].hide)
const displayedProperties = showHiddenProps ? event.properties : omit(event.properties, hideableKeys)

[timgl]

I disagree this is more readable, especially if you're familiar with lodash. I'm also really loath to add more libraries in general!