A way to set the docker stop timeout (normally specified with the -t paramater in the `docker stop` command), per container rather than globally. Use case: Containers which require extra time to stop, in order to save databases and other shutdown tasks (for example, the Storj container), but without increasing system stop time in the event of a misbehaving different container. In addition, this should apply to the "stop" command in the GUI, which I'm unsure if currently obeys the system default.