Buildset vs. Selection

[David Nolden]

I think ideally the build-set and selections should somehow be integrated, so 
everything is totally clear.

If you have a build-set then you should always build that. It should not be 
possible to hide the build-set widget when the build-set is not empty.

When you don't have content in the build-set, then the current selection 
should be "mirrored" in the build-set widget in grey, so it's always clear 
what you're about to build.

Then you could have a single button to convert the selection into a "real" 
build-set.

Greetings, David