Sum the same titles in pie chart

```
When i am working i use title "work" and these are 40-50 minute period, but 
every time a add a new task as "work", then there will be multiple sections at 
the pie chart as "work". So is it possible to handle them as one big section at 
the pie chart eg. titled as "work"?
```

Original issue reported on code.google.com by `englert....@gmail.com` on 17 Aug 2015 at 1:31
