Use a fixed line height on tracklist lines

[ToadKing]

When lines in a tracklist have CKJ characters, the line height can change. This can make switching between English and Japanese tracklists have the height of the entire tracklist change which can make comparing titles difficult and just behaves odd IMO. Defining a line-height for the tracklist (either by the smallfont CSS class or some new one just for tracklists) can fix this.