fixing long names on outline, unit, container

Prevent wrapping and edit button moving to a new line on long names on outline, unit, container.

@talbs @cahrens Can you review?
This makes a lot of sense and is a better solution for both places. A couple of questions:

* Did you remove any outline specific fixes I may have added to the _outline.scss file in my styling work? I'd assume (and prefer) that we have this solution that covers cases of where we need it.
* Should we extend the ```%cont-truncated``` Sass placeholder (that has overlap with all of the truncating properties you've added here?)