I have a question about the 'show highlighting' option when in 'album covers' view. I use the application-wide highlighting system, but this seems to be separate from that. How is this used? The screenshot shows the application-wide system found in preferences, and the separate highlighting system found in configure layout>main panel>customise panel. I have highlighting rules set, but when I select 'define rules' under the customise panel for album covers, no rules are defined.