Feature request: group spending tab similar to splitwise

[meta-boy]

I have written my own script to calculate this from the json dump that spliit generates. But would be very useful if the same is shown on the UI itself
ref:

[meta-boy]

if this is accepted as a feature request then I can pick this up. I'm not very familiar with frontends so would really love a few reviews and an opportunity to learn :)

I will anyways be raising a PR for my own fork.

[guysoft]

A feature that I am missing here is monthly spending total. The dropdown that is there is not implemented - should I open a separate issue for that?