Added an actual `docker context import` command since the use of this command in conjunction with client bundles was not present in this or the `docker context` documentation. Also increased the emphasis of using `docker context import` vs. prior methods by pulling the new feature out of the note. This information is important and was not obvious enough in the note.
We recently had a client open a case, because UCP system containers were not visible when typing `docker ps`, while using a UCP client bundle. Upon hearing that the behavior of the client bundle is different than that seen without the bundle (e.g. `docker ps -a` is necessary to view system containers), he asked that we add some indication to the documentation that this is expected behavior. This is the least invasive way I can think of to introduce such a change to the article. Better ideas welcome!