Better sorting in the report

[orzelmichal]

With hundreds of requirements coming from different source file, the current alphabetical sorting in the report (HTML) results in a mess, because requirements from different files (i.e. components) are mixed.

We would like the report to be sorted by components, so that requirements that belong to one component are grouped together (within the group, alphabetical sorting can be kept).

Simple example: Current behavior -ReqA (source1.c) -ReqB (source2.c) -ReqC (source1.c) -ReqD (source2.c)

Desired behavior source1.c: -ReqA -ReqC source2.c: -ReqB -ReqD