Relations between Clients and Bill-to

[mwa85]

What version of Invoice Ninja are you running? ie v4.5 / v5
v5.8.47

What environment are you running?
Docker

Have you searched existing issues/requests?
Don't believe so, have search and not found other

Additional context
Would be nice to have a little more features on the clients in relations to each other, ex. a dropdown-field named "Owner" where it's possible to select another client and a view on the client details that shows (link to) all that have that client selected (ex. if Person-1 own Company-A and that Own Company-B) also option of "Bill-to:" where it's possible to select another client invoices should be issued to if work is done for one client.

I know that the Bill-To feature will take some work, but the relations dropdown and view would be only 1 database field more on the clients and then a bit of logic and html. The use case is ex. if a Holding have 5 companies and your like to have an overview of all clients and not needing to remember all ownerships.

Hope that this is something people will find useful and it can be implement :)