Sort the scripts and scenes into folders

main/ holds the main window and top bar, quiz/ the quiz and its parts,
player/ the music player, popups/ every popup and what they share, data/ the
songs, players, playlist and settings, server/ the MusicServer client,
common/ the list row and GameLog, and themes/ the themes and style boxes.

quiz/song_row.gd

@@ -0,0 +1,37 @@
+class_name SongRow
+extends PanelContainer
+## One song in the music list: its number, soundtrack and title, and a marker for
+## each player who got a point for it.
+
+var song_object: SongObject
+
+@onready var song_list_label: Label = %SongListLabel
+@onready var song_list_players: HBoxContainer = %SongListPlayers
+
+
+func _ready() -> void:
+	set_label()
+	update_players()
+
+
+func set_label() -> void:
+	if song_object != null:
+		var size_to_change: int = song_object.players_given_point.size() * 50
+		song_list_label.custom_minimum_size = Vector2(1000 - size_to_change, 28)
+		if song_object.is_playing:
+			song_list_label.add_theme_color_override("font_color", Color(1, 0.5, 0))
+		song_list_label.text = song_object.get_song_info()
+
+
+func update_players() -> void:
+	Settings.delete_children(song_list_players)
+	if song_object != null:
+		# Show players in the same order as the player list
+		for player: PlayerObject in Settings.player_array:
+			if song_object.players_given_point.has(player.id):
+				var texture: TextureRect = TextureRect.new()
+				texture.texture = player.character
+				texture.expand_mode = TextureRect.EXPAND_FIT_WIDTH_PROPORTIONAL
+				texture.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_CENTERED
+				texture.custom_minimum_size = Vector2(50, 25)
+				song_list_players.add_child(texture)