Update DASH history instructions

[jbr7rr]

https://github.com/nightscout/AndroidAPS/pull/2549

Has been merged into dev, which changes the view of the pod history by adding the total amount insulin delivered

Note: This amount is the amount that is in the reservoir on POD connection, so when a bolus is issued, it's the ammount before the bolus was issued.

Question: If I where to pick this up which branch to target?

[psonnera]

@jbr7rr is this still an issue?

[jbr7rr]

@jbr7rr is this still an issue?

Yes