Fixes #295: ported Alert widget adjustments from basic template
Fixes #295: ported Alert widget adjustments from basic template

These are to use run() method instead of init().

yiisoft/yii2-app-advanced,dmitry-kulikov/yii2-app-advanced,erycamel/yii2-app-advanced,yiijan/yii2-app-advanced,githubjeka/yii2-app-advanced,erycamel/yii2-app-advanced,githubjeka/yii2-app-advanced,yiijan/yii2-app-advanced,dmitry-kulikov/yii2-app-advanced,yiisoft/yii2-app-advanced