Use 'Yii::$app->request->post()' instead of $_POST

Consistent column naming

Changed '_' to equal html code.

Minor updates to apps

Fixes #1881: Improved `yii\bootstrap\NavBar` with `containerOptions`, `innerContainerOptions` and `renderInnerContainer`

Fixes #1186: Changed `Sort` to use comma to separate multiple sort fields and use negative sign to indicate descending sort

Fixes #2295: basic app description now doesn't insist it is for websites containing mainly informational pages since it was misleading

#2436 receive label of the attribute from related model

added yii console command to tests

* Added 'return' to goHome() calls in actions
* Changed $_POST to Yii::$app->request->post()

Minor typo

Fix for multiple $.ajax calls with "JSONP" dataType

#2436 override the function `getAttributeLabel` in `BaseActiveRecord` to receive label of the attribute, which looks like `relatedMode.attribute`, from the related model

#2436 override the function `getAttributeLabel` in `BaseActiveRecord` to receive label of the attribute, which looks like `relatedMode.attribute`, from the related model

#2436 override the function `getAttributeLabel` in `BaseActiveRecord` to receive label of the attribute, which looks like `relatedMode.attribute`, from the related model

Debug module mail improvements