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

Added in an isset check because if you set a flash type that is not in our expected index it will throw a undefined index error

Revert "Fixes #1856: The default CSS class for hint generated by `ActiveField` is changed to `help-block`"

This reverts commit 7ae4695d.

fixes #2099

fixes #2094

Removed error-block HTML class and related styles and used Bootstrap3 standard practice about errors instead

to allow specific styling
also fixed an issue with gridview sort indicator css.

fixes #1000

Fixes #1597: Added `enableAutoLogin` to basic and advanced application templates so "remember me" now works properly