Feature: Unite the same groups of different accounts

[DerSaxxe]

At the moment same groups of different accounts shows different groups. They should be united. In example only one group for "Familie", "Freunde"...

[Elleriyc]

Hello, i'm a student in computer science. And for one of my course I need to contribuate to something. I'm interest to fix this. Can I ?

[tibbi]

@Elleriyc sure

[Elleriyc]

Thanks you !