Fix failing tests

Apply fixes from StyleCI (#2278)

Replace Mockery with PHPunit test doubles

Tests

Tests

Working on modules

Unused imports

Refactor module components

Delete old database code

Testing

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

Tests

Tests

#2159 - Allow tabs and sidebars to register the facts that they handle.

Testing

Testing

Testing

Testing

Testing

Testing

Testing

Working on upgrade wizard and testing