I think that current selection process if far from ideal. First of all, I have a strong feeling that two step selection is not good user experience. Selecting items, then adding them to selected items by "Add to selection" click, then finally click "Use selected" is too long process. But thankfully, it's possible to enable option "Automatically submit selection". I have a feeling that in the future it should become the default (maybe even the only possible way to select content). That way, when you select things on the list, they are automatically added to the selected items list.
In this ticket I don't want to get rid of two step selection, as even I don't like that experience, maybe it's useful is some scenarions (hard to find good examples, but I might miss something). So the improvements that I'm going to propose here are related to improve the whole experience when selecting items with "Automatically submit selection" option enabled.
First of all, configure you entity browser to allow to select items with "Automatically submit selection" option enabled.
The improvements proposed here are:
This code is far from ready. It's rather first step to improve selection process. I implemented and tested it with "Automatically submit selection" enabled. I'm not sure, if it won't break anuthing in the current implementation. So you use it on your own risk.
Active
2.0
Selection display plugins
@gugalamaciek please use a MR instead of patches.