The successful/failed File Transfers widget in the Dashboard view calls REST Web Service with wrong dates

Current Situation
When configuring the widget to show transfers of the last 7 days the widget calls the webservice with dateFrom: "-7d", dateTo: "-7d" which results in no transfers are shown.
Same error happens with "Last hour" "Last 12 hours" "Last 24 hours".

Desired Behavior
When configuring the widget to show transfers of the last 7 days the widget should call the webservice with dateFrom: "-7d" and dateTo: "0d" to acquire all transfers within the given timespan.