Remove Points Hooks admin screen

[JDGrimes]

This is a long-term project that will take some preparation. Some details on that can be found in https://github.com/WordPoints/hooks-api/issues/23. In part what we'd like to do is get better parity between the old points hooks and the new hook events.

Curated list of steps:

• [ ] Achieve feature parity.
• [ ] Import old hooks.
• [ ] Deprecate old code.
• [ ] Remove the old screen.

Curated list of issues with feature parity:

• [ ] Old Publish Post hook awarded for new post types automatically via the All setting. In the new API we could notify the user (#385) and let them decide to create a reaction for that post type.
• [ ] Old hooks had dynamically generated log text. We should make this possible in the new API, see #478.
• [x] Old hook instances could be disabled by dragging them to a inactive pseudo points type (https://github.com/WordPoints/hooks-api/issues/31). We should make it possible to disable reactions (#470), and then import these to all points types.
• [ ] Old hook instances could be ordered by the user. We could introduce an ordering API. (#609)
• [ ] Old Comment Remove and Post Delete hook instances could be unpaired. We would need to introduce new events for that to handle them on legacy sites.
• [ ] Old hooks could have reversal disabled. We should make this visible in the new UI for legacy hooks (#475).
• [ ] Old Publish Post hook instances did not award points for the Media post type (https://github.com/WordPoints/hooks-api/issues/45). This bug is fixed in the new API, but we may want to consider what to do on import of those instances, since they'll suddenly begin working.
• [ ] Old custom hooks could be added outside of core. We'll probably just drop support for them with 3.0.0.
• [ ] Old Comment Received hooks did not award the post author points. We should make it possible to not award points to the post author in the new API. (#690)

[JDGrimes]

See also: https://github.com/WordPoints/hooks-api/issues/31, https://github.com/WordPoints/hooks-api/issues/45

[JDGrimes]

Moved to https://github.com/WordPoints/wordpoints/issues/580#issuecomment-266040865.

[JDGrimes]

Moved to https://github.com/WordPoints/wordpoints/issues/580#issuecomment-266040865.

[JDGrimes]

Moved to https://github.com/WordPoints/wordpoints/issues/580#issuecomment-266040865.

[JDGrimes]

Moved to https://github.com/WordPoints/wordpoints/issues/580#issuecomment-266040865.

[JDGrimes]

The above comment really applies to import of the affected hook types, not to removing the screen completely.

Speaking of which, I've just added a basic outline of steps and list of features that we need to achieve parity with to the main comment. I think that we need to create a ticket for each part of this, like a ticket for importing the hooks, and one for each thing that needs to be done to achieve feature parity. That will help to keep this ticket from getting unmanageable.

[JDGrimes]

257 is another issue to consider with feature parity, I think.