Co-Authored-By: Mikey O'Toole <mikey@mjco.uk>

Co-Authored-By: Mikey O'Toole <mikey@mjco.uk>

Co-Authored-By: Mikey O'Toole <mikey@mjco.uk>

Formatting and wording

See: https://github.com/civicrm/civicrm-core/pull/14184

Fix typo

Add CaseContact to hook_civicrm_post() and hook_civicrm_pre() documentation - see https://github.com/civicrm/civicrm-core/pull/14030

Reposition 'Campaign' in list to be alphabetical

Clarify that the ContactID refers to the user making the query - my reading had been that it was the contact ID of the contact that was being considered.

Explain what the `$type` parameter means/relates to.

Formatting tweak

I believe the getMenuKeyMax function is missing it's underscore inside the hook.

- Updated incorrect interface method name.
- Reorganized to match the de facto standard apparent on other hook pages.
- General content improvements.

Describe new variables due to dev/core#457

Remove some old content
Generally refresh

Describe new variables due to dev/core#457