Some Annotation Typos

close #6029

Fixes #5799: `yii\bootstrap\ButtonGroup::buttons` can take all options that are supported by `yii\bootstrap\Button`

Fixes #6018: When setting the `encode` option via `yii\widgets\ActiveRecord::errorOptions`, it works the other way around [skip ci]

Fixes #5863: Selecting all individual `yii\grid\CheckboxColumn` checkboxes in grid view wasn't resulting in "all" checkbox selected

Fixes #5688: Added optional `$formName` to `Model::loadMultiple()` to support customizing form name directly

Fixes #5768: When setting `data-confirm` attribute to a submit button, clicking on the button would not trigger form submission

Fixes #4889: Application was getting into redirect loop when user wasn't allowed accessing login page. Now shows 403

Fixes #5954: `yii message` command now shows user friendly error if it's not able to parse source file

Fixes #5925: `ArrayHelper::htmlEncode()` does not work properly when the value being encoded is a nested array

Recursive method call must have the same parameters as the first call.

Added note about bootstrap version.