Chrome Version       :  68.0.3440.118
URLs (if applicable) :
Other browsers tested:
  Add OK or FAIL, along with the version, after other browsers where you
have tested this issue:
     Safari:
    Firefox:
       Edge:

What steps will reproduce the problem?
(1) open ssh extension (chromeos)
(2) enter your username and add a whitespace
(3) press connect
What is the expected result?

whitespace stripped OR highlighted

What happens instead?

access denied error. This is even more common if the username is copied

Please provide any additional information below. Attach a screenshot if
possible.