Fixes #1691: added “viewport” meta tag to layout views.
fixed unit test config.
Refactored unit tests.
Fixes #1701.
removed duplicated test config.
Merge remote-tracking branch 'upstream/master'

up to 64bb3cde3918fdd273632222ee4d8469d471241a

Conflicts:
	config/web.php
	tests/_bootstrap.php