App accounts for less time in reports

[tuxayo]

1. Don't track (to not trigger #25)
2. have more than 10 events put via the start and stop button, not manually. Because they need to not be round to the minute. I suspect it's a truncation issue.
3. see weekly total, e.g. 44 min
4. reports: current, week, events tomes per task weekly
5. Preview
6. Preview shows 36 min

I had an example of past weeks where. The differences are
16:26 in app vs 15:24 in reports
5:24 in app vs 5:07 in reports

[Mathis Dirksen-Thedens]

This seems to be another appearance of #100 which I sadly can't reproduce.

[tuxayo]

@mathisdt I've found a way to simply reproduce and posted it there.