Feature: Multi Inventory

If you have multiple warehouses in a warehouse group, at the moment you need to save the changes for every single warehouse one after the other. This does not feel intuitiv and slows down the process.

I have recorded this in a test environment:
https://www.awesomescreenshot.com/video/44727162?key=8481c10b30e8e71a1daeda1cee4be3da

As you can see this can be quite annoying.

In my opinion, it would be more user friendly if there would be one global save button for the multi inventory window than having to save every single change for every single warehouse.