Change Consumption calculation method in Dashboard

Now the consumption calculation method apparently looks at taken trips consumptions, and calculates average from that.

If the battery was cold, but heated up while driving, this can cause negative consumption in some shorter trips (estimated range & % go up) - which results in ridiculously low consumption numbers (I'm seeing 15 kWh/100 km in the dashboard).

More accurate method to calculate average consumption would be just to divide the charged kWh per driven kilometers during the selected time period - which gives me 25,5 kWh/100 km.