Option to automatically infer inversion method in concatFlags

Currently concatFlags expects an explicit declaration on what alignment/resampling method it should invert. As it is not always obvious what method to choose, this MR implements an auto resolution, that infers the last alignment/resampling method to revert from the History.

Although, that is not explicitly on our %2.4.0 milestone, I really like to add it, as it IMO is an important simplification of the harmonize-dostuff-deharmonize workflow.

A review from both of you @palmb and @luenensc would be great, that's why I didn't explicitly assign a reviewer.

Based on !658 (merged) , so should be merged afterwards.