fixes #5104, fixes #5101

Fixes #2380: Added `yii\widgets\ActiveForm::enableClientScript` to support turning on and off client side script generation

Fixes #5058: `yii\helpers\Html::activeCheckbox()` and `activeRadio()` will generate labels by default using the corresponding attribute labels

Asset improvements

[skip ci] Russian translation of structure-views.md

Formatting fix

Phew :)

[ci skip] Update structure-views.md

- We do not generate static pages in controllers, but merely output them.
- We need to say that the data is needed to be plainly put into the view, as the reader might expect something more sophisticated to happen here.

Update structure-views.md

registerMetaTag() usage clarification

Fixed `yii\console\controllers\CacheController` does not check if cache component instance of 'yii\caching\Cache'

close #5055

[WIP] extracted date format converting to a helper class

fixes #5080

Fixes #5058: Added `$pageSize` parameter to `Pagination::createUrl()` to allow creating URLs with arbitrary page sizes

Fix alias in authclient widget asset bundle

[WIP] New asset management

Fixes #4454: Improved asset bundle managed and used composer-asset-plugin to manage the dependencies on 3rd-party JS libraries