Changing the Logo Quick Screen (http://support.proclaimonline.com/hc/en-us/articles/203820175) forces the upload of a new image file. If your logo is already in the media library, there is no need or desire to upload another copy of it (and some users may not even have this file to upload). There should be an option from the Media library to "Set as Logo", alongside the current options to "Add new service item", "Apply to current item", and "Add to foreground".
