make sure tree items can't be moved out of bounds

ServerUI.gd

@@ -108,6 +108,7 @@ func _on_FileTree_item_edited() -> void:
 
 func _on_FileTree_item_selected() -> void:
 	var item: TreeItem = file_tree.get_selected()
+	current_tree_selection = item
 	current_file = item.get_metadata(0)["file_def"] as FileDef
 
 	if !current_file.dirty:
@@ -124,6 +125,17 @@ func _on_FileTree_item_selected() -> void:
 func _on_FileTree_item_rmb_selected(position: Vector2) -> void:
 	current_tree_selection = file_tree.get_selected()
 	file_tree_context_menu.rect_position = position + file_tree.rect_global_position
+	if (current_tree_selection.get_metadata(0)["id"] as int) == 0:
+		file_tree_context_menu.set_item_disabled(ContextMenuOptions.MOVE_UP, true)
+	else:
+		file_tree_context_menu.set_item_disabled(ContextMenuOptions.MOVE_UP, false)
+
+	if (current_tree_selection.get_metadata(0)["id"] as int) == working_files.size() - 1:
+		file_tree_context_menu.set_item_disabled(ContextMenuOptions.MOVE_DOWN, true)
+	else:
+		file_tree_context_menu.set_item_disabled(ContextMenuOptions.MOVE_DOWN, false)
+
+
 	file_tree_context_menu.popup()
 
 
@@ -158,7 +170,12 @@ func _is_file_in_filestxt(path: String) -> bool:
 func _get_file_metadata(path: String) -> Dictionary:
 	var f := File.new()
 
-	var res = {}
+	var res = {
+		"file_path": path,
+		"date": "",
+		"title": "",
+		"content": "",
+		}
 
 	if f.open(server_dir.plus_file("files.txt"), File.READ) == OK:
 		var text := f.get_as_text()
@@ -166,10 +183,10 @@ func _get_file_metadata(path: String) -> Dictionary:
 		for line in lines:
 			line = line as String
 			if line.empty():
-				res = {}
+				continue
 			var def = line.split(" ", true, 2)
 			if def[0] == path:
-				res["file_path"] = def[0]
+#				res["file_path"] = def[0]
 				res["date"] = def[1] if def.size() > 1 else ""
 				res["title"] = def[2] if def.size() > 2 else ""
 				break