You can easily change the way the Media Campaign is displayed in the header of the Media Configuration by adapting a feature setting. 

Here is how to:

Navigate to the app launcher and open the feature settings Tab. 

• Create/edit a Feature Setting (default added by Postinstall contains the MC name and Advertiser field)

  Feature Setting Name	Feature Name
  MediaCampaignDisplayFields	MediaConfiguration

• Add the field paths starting at the Media Campaign object (lookup relations with "__r.")

• Avoid blanks and use semicolons to separate.

Example