adds the option to disconnect / reconnect after sending M112. May help break out of blocking commands by resetting some control boards
Update icon to new FA icon to be compatible with octoprint 1.3.5's move to an update font awesome Add a setting to allow changing of the command in situations where the user may wish to issue some other command other than M112
dynamic class based on state, completely invisible to non logged in users
clean up the jinja a bit too
