[Kmymoney] Feature Request: investment Performane report should show summary

[Benedikt Hallinger]

Hello there,
first, thanks for this wonderful piece of software!

I wanted to propose a little enhancement to the reports section regarding 
the investment performance report.
iIt would be nice if at the end of the list there would be a weighted 
IRR-performance over the entire investments as well as a volatility summary.
This way one could gauge if return and risk assumtions are in line with 
reality.

With best regards,
Beni