refs #5983 fixed some jshint warnings

plugins/CoreHome/angularjs/common/filters/evolution.js

plugins/CoreHome/angularjs/common/services/piwik-api.js

...Home/angularjs/siteselector/siteselector-model.service.js

...edback/angularjs/ratefeature/ratefeature-model.service.js

.../Feedback/angularjs/ratefeature/ratefeature.controller.js

plugins/MultiSites/angularjs/site/site.controller.js

...itesManager/angularjs/sites-manager/api-helper.service.js

.../SitesManager/angularjs/sites-manager/scroll.directive.js

...nager/angularjs/sites-manager/sites-manager.controller.js