Classification: allow copy from "lead" RS

[#1]

when managing multiple ReportSuites (especially on clean up/creating standards) there is currently no option to copy the classification from one RS to another.

It would be very useful if I can select one ReportSuite as "lead" and copy those settings to desired other ReportSuites. the existing settings (existing classifications) on the target ReportSuites get either updated (might be hard to implement) or deleted and created from "lead".