Clean after change room: game scene is cleanly removed from prev room (#416)

addons/escoria-core/game/core-scripts/esc/commands/change_scene.gd

@@ -83,6 +83,10 @@ func run(command_params: Array) -> int:
 			]
 		)
 	
+	if escoria.main.current_scene \
+		and escoria.game_scene.get_parent() == escoria.main.current_scene:
+		escoria.main.current_scene.remove_child(escoria.game_scene)
+	
 	# Load room scene
 	var room_scene = res_room.instance()
 	if room_scene:

addons/escoria-core/game/main.gd

@@ -40,9 +40,9 @@ func set_scene(p_scene: Node) -> void:
 	if current_scene != null:
 		clear_scene()
 
-	add_child(p_scene) 
+	if not p_scene in get_children():
+		add_child(p_scene) 
 	move_child(p_scene, 0)
-
 	current_scene = p_scene
 	check_game_scene_methods()
 
@@ -59,7 +59,8 @@ func clear_scene() -> void:
 	escoria.action_manager.clear_current_action()
 	escoria.action_manager.clear_current_tool()
 	
-	current_scene.remove_child(escoria.game_scene)
+	if escoria.game_scene.get_parent() == current_scene:
+		current_scene.remove_child(escoria.game_scene)
 
 	remove_child(current_scene)
 	current_scene.free()

addons/escoria-ui-9verbs/game.gd

@@ -39,7 +39,7 @@ onready var pause_menu = $ui/pause_menu
 onready var inventory_ui = $ui/Control/panel_down/VBoxContainer/HBoxContainer\
 		/InventoryMargin/inventory_ui
 
-func _ready():
+func _enter_tree():
 	ProjectSettings.set_setting("escoria/ui/tooltip_follows_mouse", false)
 	escoria.action_manager.connect(
 		"action_finished", 
@@ -47,6 +47,13 @@ func _ready():
 		"_on_action_finished"
 	)
 
+func _exit_tree():
+	escoria.action_manager.disconnect(
+		"action_finished", 
+		self, 
+		"_on_action_finished"
+	)
+
 
 ## BACKGROUND ## 
 

addons/escoria-ui-simplemouse/game.gd

@@ -38,6 +38,12 @@ func _enter_tree():
 		"_on_action_finished"
 	)
 
+func _exit_tree():
+	escoria.action_manager.disconnect(
+		"action_finished", 
+		self, 
+		"_on_action_finished"
+	)
 
 ## BACKGROUND ##