[6.x] Forms 2: Visualize responses

[jaygeorge]

What this PR Does

• Adds a "summary" view to the form results
• Demos are currently rendered static, ready to be made dynamic
• I've tried to comment above each graph to explain things

Multi choice pie charts

• When there are more than 4 segments, the 4th segment should become "other" and the second page of the widget should break down the "other" segment, like in the second widget demo

Horizontal Bar Charts

• There should be a maximum of 5 rows per page for horizontal bar charts

Star Rating

• When there are more than 5 stars this should become a vertical bar chart, as shown in the second star demo

How to Reproduce

1. Forms > someform > Results > click the Summary icon