#1 Editing an recurring expense, which already has occured

[M. T.]

If a recurring expense (eg. starting from the 1. of July) has been edited on the first of October, it would result in changing the whole expense itself (also that from the first of July).

Todo:
Must prompt the user a dialog in which the user can decider, whether the whole recurring expense will be changed or stopped. If the recurring expense is to be suspended it MUST be copied with the new data, so that the transition between the old and the new expense is seemless.