User story #7618
Add an option to disable display changes graphes if they are slow
On firefox (and old browsers) displaying recent changes graphes does not work fine .
On firefox 42, everything is ok ! (with the latest version of d3/c3.js, updated in 3.0.12 and 3.1.5)
But still we want that page to be displayed quickly even on those browsers
A solution is to add an option to replace those graphs by the sum of all changes over the last 3 days without details
That option can be activated on the fly via the web interface