upd `ru` and `uk` messages

New french messages

Fixes #2726: ActiveRecord now fills default values on creating new instance of the model if defaults are available from DB schema

better to use strict comparison as much as possible

Conflicts:
	extensions/bootstrap/CHANGELOG.md
	extensions/bootstrap/Nav.php

Fixes #2726: ActiveRecord now fills default values on creating new instance of the model if defaults are available from DB schema

Updated spanish translation

Update yii.php

Made Theme::basePath optional fixes #2810

Added asElapsedTime function to Formatter

fix User::getReturnUrl() after #2501

Update usage example in comments of db\DataReader