It should be possible to create a milestone hierarchy. The hierarchy not be limited in depth. It should be possible to nest the child milestones as deep as desired

Use Case: We have a milestone for development version 1.x.x. This consists of the thematically independent feature offers ABC and DEF, which are combined to the version 1.1.x and if necessary further bug fix releases with smaller supplement offers to the topics. Later follows version 1.2.x with further feature larger feature offers.

Example:

1.x.x

..|-1.1.x

..|..|-ABC

..|..|..|-Bugfix ABC with minor additional features

..|..|-DEF

..|..|..|-1.2.x

..|..|-GHI

[...]

Regarding test analysis and reporting, I also hope for a kind of drill down and drill up function, with which I can evaluate results in fine granular form or cumulated. (Compare e.g. https://www.highcharts.com/demo/column-drilldown by clicking on a bar).