formatting date and time values for years >=2038 or <=1901 is now possible also with intl extension is
installed. 32bit systems will fall back to the PHP implementation because intl uses a 32bit UNIX timestamp internally.
On a 64bit system the intl formatter is used in all cases if installed.

fixes #5577

fixes #6760

typos

fixes #6682

miss blank

close #6578

Adding the tag titled "yii2" on Stackoverflow to Community list.