Lighten discussion list hover color
Lighten discussion list hover color

When the list is shown in the side-pane, the background of the currently-selected discussion is the @control-bg. The hover color shouldn't be quite as strong as that.

datitisev/core,malayladu/core,Luceos/core,flarum/core,malayladu/core,datitisev/core,malayladu/core,Luceos/core,renyuneyun/core,datitisev/core,malayladu/core,datitisev/core,Luceos/core,flarum/core,renyuneyun/core,Luceos/core,flarum/core,renyuneyun/core,renyuneyun/core