- Enh #6697: Added `yii\helpers\Url::current()` method that allows adding or removing parameters from current URL (samdark, callmez)
- Enh #6739: Log `Target` now works also when there is no `Yii::$app` instance available, no message prefix will be added in this case (schmunk42)
- Enh #6748: Improved HTML to Text converter in BaseMailer to generate more readable and correct text version of emails (cebe)
- Chg #5690: adjusted paths in message config generated by `yii message/config` to reflect directory structure better (mikehaertl, samdark)
- Chg #6427: In case of invalid route web application now throws exception with "Page not found" instead of "Invalid Route" (cebe, samdark)
- Chg #6641: removed zero padding from ETag strings (DaSourcerer)
- Chg #6678: `yii\behaviors\SluggableBehavior` will generate a new slug only when the slug attribute is empty or the source attribute is changed (qiangxue)