Hide help text when opened from canvas.
Merge pull request #536 from kadams54/dismiss-help

Hide help text when opened from canvas.

We only want to display the help text in the inspector when a service is initially deployed. Or, put differently: we want to hide the text when a user is clicking on an existing service in the canvas.
Added deleting of units on container tokens.
Added tests for deleting units on container tokens.
Update machine token icons.
Merge pull request #538 from huwshimi/destroy-container-units

Destroy container units

Added functionality to remove units that are on container tokens.
Only call the root or selected container selection, not both.