Summarise updated issues?

[originalfoo]

Currently there's no metric on how many issues have been updated in the past week (only new + closed). Could we add a metric in the issue summary line, for example:

Summary: 170 open (N modified), 316 closed

Where N is number updated within past week. Should just be a case of including the updated search term in to query used for new tickets.

Ruby kinda melts my brain otherwise I'd submit a PR for this.