Fixes: CHtml::activeTelField() used to display time input, not tel.
Fixes: CActiveForm::telField() used to display time input, not tel.
Fixes #2087: CLocale: getLocaleDisplayName() was only returning the language display name, not the full locale display name.
Enh #2135: Yii::t() messages in subfolders

Manual merge of PR #2209 of @firsyura
CHANGELOG adjustment for #2209