remove warnings in ServerUI

ServerUI.gd

@@ -37,12 +37,12 @@ onready var content_preview_richtextlabel := $"%ContentPreviewRichTextLabel"
 onready var server_folder_dialog := $"%ServerFolderDialog"
 
 signal server_folder_changed(new_path) # new_path: String
-signal server_port_changed(new_port) # new_port: int
 signal start_server_button_pressed(port, path) # port: int, path: String
 signal stop_server_button_pressed() # emit from %StartServerButton, when the server is not running.
-signal open_browser_button_pressed(port) # port: int
 
-signal files_selection_changed(new_files) # new_files: Array<String>
+#signal server_port_changed(new_port) # new_port: int
+#signal open_browser_button_pressed(port) # port: int
+#signal files_selection_changed(new_files) # new_files: Array<String>
 
 var server_dir: String setget set_server_dir
 var is_server_running: bool = false setget set_server_running
@@ -73,9 +73,10 @@ func set_server_dir(dir: String) -> void:
 
 	var directory := Directory.new()
 	if directory.open(dir) == OK:
-		directory.list_dir_begin()
+		if directory.list_dir_begin() != OK:
+			push_error("Directory error") # TODO: show a user-facing error
+
 		var file_name: String = directory.get_next()
-		var idx: int = 0
 		while file_name != "":
 			if !directory.current_is_dir() && (file_name.get_extension() in ACCEPTED_FILE_FORMATS):
 				var fd = FileDef(file_name, false)
@@ -89,13 +90,12 @@ func set_server_dir(dir: String) -> void:
 					fd.title = file_metadata["title"]
 					fd.date = file_metadata["date"]
 
-				idx += 1
-
 			file_name = directory.get_next()
 
 		directory.list_dir_end()
 
 	_reconstruct_tree_from_working_files()
+	emit_signal("server_folder_changed", server_dir)
 
 
 func _reconstruct_tree_from_working_files() -> void:
@@ -149,7 +149,6 @@ func _on_FileTree_item_rmb_selected(position: Vector2) -> void:
 		file_tree_context_menu.set_item_disabled(ContextMenuOptions.MOVE_DOWN, false)
 
 
-
 func _on_OpenServerFolderButton_pressed() -> void:
 	server_folder_dialog.popup()
 
@@ -287,6 +286,7 @@ func _on_DocInputTextEdit_text_changed() -> void:
 			t.one_shot = true
 			current_file.timer = t
 			add_child(t)
+# warning-ignore:return_value_discarded
 			t.connect("timeout", self, "_on_EditedTimeout_timeout", [t, current_file])
 		else:
 			current_file.timer.stop()