* master: (22 commits)
  Fixes #4971: Fixed hardcoded table names in `viaTable` expression in model generator
  Fixed test break.
  Fixes #4955: Replaced callbacks with events for `ActiveForm`
  Fix brackets
  Rename `\yii\web\User` component param for consistency
  Html::button() type is `button` by default
  Fix bug in Estonian translation
  Typo fixed inside \yii\rest\CreateAction
  Fixed test break.
  Fixed test case.
  note about validation rules order
  Return a fixtures cleanup in case of a failing test
  Update finnish translation
  skip fixture controller test on HHVM
  Make unit tests cleanup a DB after finish
  Fixes #4945: Added `yii\test\ArrayFixture`
  added array fixture class
  minor doc adjustment [skip ci]
  Fixes #4948. Thanks, @johan162
  Fixes #4947
  ...

Conflicts:
	framework/UPGRADE.md