This feature has been added but the behavior is hidden by default. For those like me that came here looking to fix this poor UX decision, you can enable it by:
$ gsettings set org.compiz.unityshell:/org/compiz/profiles/unity/plugins/unityshell/ launcher-minimize-window true
This feature has been added but the behavior is hidden by default. For those like me that came here looking to fix this poor UX decision, you can enable it by:
$ gsettings set org.compiz. unityshell: /org/compiz/ profiles/ unity/plugins/ unityshell/ launcher- minimize- window true
Verified with Ubuntu 16.04