* Reapply "Sentry context in live views (#3672)"
This reverts commit 5449fead160064b8a0081c458cc5dcd34399eb0b.
* Make sure `:selection_made` is handled in `GoalSettings.Form`
That was a bit unepexcted.. normally `handle_info` is injected
by the LiveView use macro and it discards any message gracefully.
After switching to `use PlausibleWeb, :live_view` we're also
using `PlausibleWeb.Live.Flash` that happens to inject its own receive
clause for closing the flash. Which then renders the original,
overridable, `handle_info` catch-all obsolete.
* Update LV SentryContext only on connected sockets
(first mount already has the right context coming from Sentry plug)
* Make sure Live.ChoosePlan passes `current_user_id` session key
* Add common LiveView macro to PlausibleWeb
* Keep peer data, URI and UA in /live websocket metadata
* Use new PlausibleWeb macro in existing LiveViews
* Implement adding some basic Sentry context `on_mount`
* Format
* Use macro in Live.FunnelSettings
* Update FunnelSettings.Form
