Allow writing widgets using return instead of echo in the run method to make it consistent with controller

Conflicts:
	framework/CHANGELOG.md

Codeception ext docs fix

Fixes #2157: The '*' category pattern will match all categories that do not match any other patterns listed in `I18N::translations`

* 'detail-view-attributes' of https://github.com/creocoder/yii2:
  DetailView phpDoc
  CHANGELOG
  DetailView allow set label while attribute in string format
  DetailView correct regexp

Conflicts:
	framework/CHANGELOG.md

i18n docs added

Allow writing widgets using return instead of echo in the run method to make it consistent with controller

add timeZone into base formatter

issue #1659: released buildLimitOffset() for MSSQL

Doc typo

Fix typos in constant