Feature Request: Sanity check for difference of km in fill-ups

[vKnmnn]

Hi!

As i imported my data i longed for some sanity checks. i have some lost entries / rented out my car / have someone else fill up and not log the data, so the L/100km graph will show artifacts.

The app could show a greyed out row (missed fillup) when there’s a large difference (larger than the average distance between fillups) in km between two fill ups to show the user that we're probably missing some data here. The user can then check the "missed fillup" field with a button "likely missed fillup. fix?"