Project: survey
Task (easy): Class SurveyPreview (file 'common/SurveyPreview.js', used by 'preview.js') constructor params are: formSelector (string), title (string). Method 'prependQuestion(question)' and 'appendQuestion(question)' are used to prepend/append a 'question.root' to the form (got by param 'formSelector'). Create a SurveyPreview instance with data parsed from 'localStorage.data' and all questions should use preview mode in which config panel should be hidden and question can not be editable.