Project: dom
Task (challenging): Append button imp in tools panel. Click button imp to clear entries panel and import JSON data to entries panel from prompt dialog. Save codes to 'common/entry.js'. JSON Data sample: ```{"entries":[{"type":"file", "name":"filename", "content":"content"}, {"type":"dir", "name":"dirname", "children":[{"type":"file", "name":"filename", "content":"content"}, {"type":"dir", "name":"dirname", "children":[]}]} ]}```.