Clear active host on logout

When logging out of the active host while other hosts exist,
the stale ActiveHost reference caused DefaultHost() to silently
fall through to the first alphabetical host instead of treating
the user as logged out.

Signed-off-by: Bryan Frimin <bryan@getprobo.com>

pkg/cmd/auth/logout/logout.go

@@ -71,6 +71,9 @@ func NewCmdLogout(f *cmdutil.Factory) *cobra.Command {
 			}
 
 			delete(cfg.Hosts, flagHost)
+			if cfg.ActiveHost == flagHost {
+				cfg.ActiveHost = ""
+			}
 
 			if err := cfg.Save(); err != nil {
 				return err