we have ssh omnibox support currently.  once we have issue 722175 implemented, we'll have a sftp shortcut too.  but we should look at supporting mounting too for people.

we could make it part of the CLI, or we could (ab)use the way the user submitted the text.

Enter      = currentTab       = open sftp client in the current tab
Alt-Enter  = newForegroundTab = open sftp client in a new window
Meta-Enter = newBackgroundTab = perform sftp mount