title: Cytoscape.js, add title to whole complex & right click enable
body: <p>a) I have a complex of nodes and edges. I want to add a title to the complex. Is there any way in Cytoscape.js, where I can display the title of the complex? </p>
  
  <p>b) Additionally, I want to give user an option to download the complex in png file with a right click option, but my right click on the cytoscape div doesn't work. Is there any way or any flag I need to change to enable my right click on the picture? </p>