A user-friendly interface in Custom report to chose the default data set and prest

Right now it is not easy to set the default view in Custom report (And also sometimes it is buggy)

Ideally I would like an easy way (like a checkbox) to decide what should be the default data set and in each data set what should be the default pre-set (so when user change the dataset, they see a default item that are selected).

Right now data set and pre-set are in two separates tab and you cannot find what is default data set and which pre-set is the default view and to what data set it is linked to