Follow the GDScript style guide in every script

- Types on every parameter, return value and variable, and snake_case names
  (the player name limit is the constant MAX_NAME_LENGTH).
- Spelling fixes: *_triggered, character_selected, separator, caught_errors.
  The server's catched_errors key stays as the server sends it.
- Signals are connected with signal.connect() instead of by name.
- Code is ordered signals, constants, exported vars, vars, @onready vars,
  functions, with @onready on one line and two blank lines between functions.
- Every script starts with a ## description. Template comments, old LOC notes
  and commented-out code are gone, apart from the local play code.
- Lines are at most 100 characters, apart from the local play path.
- The screenshot tour turns off the blinking text cursor so pictures match.

players_panel.gd

@@ -7,6 +7,7 @@ extends PanelContainer
 
 ## Emitted when a player has been added to [code]Settings.player_array[/code], before
 ## the list shows it.
+
 signal player_added(player_object: PlayerObject)
 
 ## Emitted when a player has been removed from [code]Settings.player_array[/code].
@@ -17,26 +18,17 @@ signal change_character_requested(row: PlayerRow, player_name: String)
 
 var _player_row: PackedScene = preload("res://PlayerRow.tscn")
 
-@onready
-var add_players_button: TextureButton = %AddPlayersButton
-
-@onready
-var add_player_container: HBoxContainer = %AddPlayerContainer
-
-@onready
-var add_player_button: Button = %AddPlayerButton
-
-@onready
-var new_player_name_field: TextEdit = %PlayerNameField
-
-@onready
-var players_list_container: VBoxContainer = %PlayersListVBoxContainer
+@onready var add_players_button: TextureButton = %AddPlayersButton
+@onready var add_player_container: HBoxContainer = %AddPlayerContainer
+@onready var add_player_button: Button = %AddPlayerButton
+@onready var new_player_name_field: PlayerNameField = %PlayerNameField
+@onready var players_list_container: VBoxContainer = %PlayersListVBoxContainer
 
 
 func _ready() -> void:
 	add_players_button.pressed.connect(add_players)
 	add_player_button.pressed.connect(add_player)
-	new_player_name_field.connect("enter_key_pressed", add_player)
+	new_player_name_field.enter_key_pressed.connect(add_player)
 
 
 ## Shows or hides the row for adding players, and the buttons for removing them.
@@ -51,7 +43,8 @@ func add_players() -> void:
 ## already as many players as there can be.
 func add_player() -> void:
 	GameLog.debug("add_player")
-	if new_player_name_field.text != "" && Settings.player_array.size() < Settings.MAX_NUMBER_OF_PLAYERS:
+	if new_player_name_field.text != "" \
+			&& Settings.player_array.size() < Settings.MAX_NUMBER_OF_PLAYERS:
 		var new_player_object: PlayerObject = PlayerObject.new(new_player_name_field.text)
 		new_player_name_field.text = ""
 		Settings.player_array.append(new_player_object)
@@ -72,8 +65,9 @@ func reload() -> void:
 		new_player.player_object = player_object
 		new_player.list_index = counter
 
-		new_player.connect("change_character_clicked", _on_change_character_clicked.bind(new_player, player_object.player_name))
-		new_player.connect("player_removed", _on_player_removed.bind(player_object))
+		new_player.change_character_clicked.connect(
+				_on_change_character_clicked.bind(new_player, player_object.player_name))
+		new_player.player_removed.connect(_on_player_removed.bind(player_object))
 
 		players_list_container.add_child(new_player)
 		counter += 1