tweak the sorting logic in our QP annotations to use the `clause-position` for sorting on :breakout type fields.

use our events framework when manually syncing a db so that we reuse code more effectively.  also, add a try/catch around the execution of the `sync-database!` call so that if an exception is thrown on our background thread we get some indication of what happened.

fix our destructuring and conditional to account for the fact that we are operating on a list of maps now.

actively remove old database-sync events from the activity feed now that we are not planning to have those in the feeds.

fixes #1219 - be more explicit about how we calculate when to create the user joined activity feed entry.

Use last two data points in sparkline summary rather than first and last. Take out relative date formatting (today/yesterday)

allow any authentic user to pull the list of users from GET /api/user and also add a check for superuser perms on the send_invite endpoint because that's only meant for admins.

add in a `:configured?` property to the /api/pulse/form_input definitions of the available channels so the frontend knows if a given channel is actually available to the user.