CodeStyle - use groupBy() consistently

Fix: #2530 - search for pending changes should ignore other statuses

PHPdoc

Fix: #1192 - only first associate shown in events of close relatives

Closures that do not use $this should be declared static

Strict types

Remove duplication

Declare static closures

Strict types and code review

Code style and testing

Dual type-hints upset vimeo/psalm, but are useful in PhpStorm

Convert from Carbon (v1) to CarbonImmutable (v2)

Fix: #2263 - facts duplicated in chart-boxes

Use UTC internally, and convert to local time for display

Use Collection class

Rename functions getFoo() to foo() and return collections instead of arrays

Refactor class User - use NULL-object pattern for guests and temporary users, create UserService

Refactor class Place

Use cache

Testing

Rename filter() to accessFilter()

Simplify row-mappers

Use closures as callbacks for sorting

Use closures to DRY up code

Add query-builder macro for substring-search