Summary of active user experience discussions should show age of most recent contribution

The summary of the "active user experience discussions" is useful as a quick look of current activity when I login into imeasure to enter results. However the age of the discussion is completely misleading as they all look old. This is because the age is - since the discussion **started**. It would be more useful if the age were calculated to be - since the **latest** contribution to the topic. I am sure most people at present just look at the ages and think to themselves, everything is old, no recent change, not worth looking at this week. By the way, I am not referring to this page of topics, but the summary that's on the main imeasure page. Thanks

- Julian