metamer: method for testing @status can be used with no action
metamer: poll: added test for @status
metamer: push: added timeout messages
metamer: attributes: setting and getting of attribute is now done in guarded block to prevent StaleElementReferenceExceptions
metamer: poll: unified testing of interval
metamer legacy: recovered lost tests
metamer: placeholder: autocomplete test is now using page fragment, changed accessors of some fields, removed unused fields