When user configure custom masthead logo for a theme, but leave the rest theme as default, it doesn't show default OpenShift masthead logo for the rest theme.
    

https://github.com/openshift/console/pull/14749/
    

Always
    

    1.Config custom masthead logo for a theme, leave the rest as default. For example, configure a custom masthead logo for dark theme.

{code:java}
$ oc get consoles.operator.openshift.io cluster -o json --kubeconfig 14749.kubeconfig | jq '.spec.customization.logos' 
[
  {
    "themes": [
      {
        "mode": "Dark",
        "source": {
          "configMap": {
            "key": "masthead-dark-logo.png",
            "name": "custom-logo-masthead-dark"
          },
          "from": "ConfigMap"
        }
      }
    ],
    "type": "Masthead"
  }
]

    Actual results:{code:none}
2. The custom logo shows up for masthead and also shows up on about page when console is in dark theme. It's empty for masthead when console is in light theme, but default logo shows up on about page.
screenshot: https://drive.google.com/file/d/1SMiO38XpNveEGG6CvbHzUXKfDzAP85fs/view?usp=drive_link
    

2. Should show default OpenShift logo for masthead when console is in light theme.
    

Guess code in https://github.com/openshift/console/pull/14749/files#diff-405eb65f788e5a0d149321eec7b359f9e6c22a54c1fd7f1973b2bc6d508f599cR71 needs update, the judgement for 'loading' is not required.