- Chg #2816: Changed default date and time format of `yii\base\Formatter` to `Y-m-d` and `H:i:s` (qiangxue)
- Chg #2911: Removed `tbl_` default for table prefix (samdark)
- Chg #2912: Relative view files will be looked for under the directory containing the view currently being rendered (qiangxue)
- Chg #2955: Changed the signature of ActiveQuery constructors and `ActiveRecord::createQuery()` to simplify customizing ActiveQuery classes (qiangxue)
- Chg #2955: Changed the signature of ActiveQuery constructors and replaced `ActiveRecord::createQuery()` with `find()` to simplify customizing ActiveQuery classes (qiangxue)
- Chg #2999: Added `findOne()` and `findAll()` to replace the usage of `ActiveRecord::query($condition)`. (samdark, qiangxue)
- Chg: Renamed `yii\jui\Widget::clientEventsMap` to `clientEventMap` (qiangxue)
- Chg: Renamed `ActiveRecord::getPopulatedRelations()` to `getRelatedRecords()` (qiangxue)
- Chg: Renamed `attributeName` and `className` to `targetAttribute` and `targetClass` for `UniqueValidator` and `ExistValidator` (qiangxue)
