switch widget code to SORM, fixes #3094

app/controllers/activityfeed.php

app/controllers/quickselection.php

app/controllers/start.php

app/views/start/_widget.php

app/views/start/edit_defaults.php

app/views/start/index.php

lib/classes/WidgetHelper.php

lib/models/WidgetDefault.php

lib/models/WidgetUser.php

lib/modules/ActivityFeed.php

lib/modules/QuickSelection.php

lib/navigation/StartNavigation.php

resources/assets/javascripts/lib/startpage.js

resources/assets/stylesheets/scss/start.scss