This would be a great improvement for 2.8 outliner window. It is a very useful feature when working in complex scenes.
So we could click on child object icons to select one from the list whithout having to spread a lot of hierarchies on outliner screen.
Made an example in the following picture:
I am excited to see your very best idea, please post good works always.
However I want to request preciously, please looks hear GSoC 2019: Outliner Improvements Ideas. Next time for Outliner related ideas / discussion. Please post there, you will be respected there. thanks…
love it a drop down liast instead of actually expanding the tree