Log through a GameLog autoload instead of print()

GameLog.debug() prints only in debug builds, and GameLog.warning() reports
problems such as unexpected server data or failed downloads.

sync_window.gd

@@ -83,7 +83,7 @@ func show_section_if_has_data(data: Variant, vbox: VBoxContainer, separator: VSe
 		return false
 
 func start_sync() -> void:
-	print("start_sync")
+	GameLog.debug("start_sync")
 	self.visible = true
 	if has_synced:
 		# Already synced, just show the results
@@ -98,10 +98,10 @@ func start_sync() -> void:
 		MusicServerClient.start_sync(sync_request_sent)
 
 func _on_sync_timeout() -> void:
-	print("_on_sync_timeout!")
+	GameLog.debug("_on_sync_timeout!")
 	var get_progress: Callable = func get_progress(data_received: Dictionary) -> void:
-		print("get_progress")
-		print("data_received: ", data_received)
+		GameLog.debug("get_progress")
+		GameLog.debug("data_received: ", data_received)
 		if data_received != null:
 			if data_received.has("progress"):
 				sync_progress_bar.value = int(data_received.progress)
@@ -176,7 +176,7 @@ func on_sync_finished(data_received: Dictionary) -> void:
 	sync_time.text = "Total time: " + data_received.total_time if data_received.has("total_time") else ""
 	Settings.currently_syncing = false
 	sync_timer.stop()
-	print("sync finished")
+	GameLog.debug("sync finished")
 	show_sync_result()
 	restart_sync_button.visible = true
 	sync_finished.emit()