When you have 20 or 30 improvements in a systems build queue and you've just finished researching one that needs to be rushed being able to put it at the top with double clicking would be a good idea, its a pain to drag it up from the bottom not sure if this is something i just wasnt doing right or something but if not it should definitely be included.

This has already been suggested here via a drag&drop mechanic: /#/endless-space/forum/28-game-design/thread/11998-suggestion-build-queue-drag-drop-expanded

This thread has been linked to the former and is moved to the archives.