NPS Dashboard no data when selecting a single day
### Expected Behavior
When selecting a single day using the time range picker, it should display all submissions from that specific day.
### Current Behavior
It doesn't show any submissions. Also, the graph shows wrong dates.
### Steps to Reproduce
1. Go to NPS dashbaord
2. Pick the same day for "from" and "to" on the time-ranger picker
3. Check the feed / stats