2065: Font format for playing songs is not applied correctly

[TIV73]

The font format indicating if a song is playing (or not) is only applied after the song is highlighted by the user, not automatically once a song starts or stops playing. To reproduce:

• Open a node containing multiple songs
• Play a song by either double clicking it or via Play now option in the context menu -> The song will be highlighted since it was selected, but keep its current font formatting
• Select another song in the list by clicking on it once -> The song that was previously selected will now be bold to indicate it's currently playing
• Play the currently highlighted song by either double clicking it or via Play now option in the context menu -> Again, the currently playing song will keep its previous font format while the song that played before will keep the 'now playing font'
• Select the first song again -> The format of the song will be updated to the correct format

Tested with Black Monkey, Golden Monkey, Material Design and Monkey Groove.