Fix editor help scroll to result

scene/gui/rich_text_label.cpp

@@ -1689,10 +1689,11 @@ void RichTextLabel::_bind_methods() {
 
 	ObjectTypeDB::bind_method(_MD("get_v_scroll"),&RichTextLabel::get_v_scroll);
 
+	ObjectTypeDB::bind_method(_MD("scroll_to_line"),&RichTextLabel::scroll_to_line);
+
 	ObjectTypeDB::bind_method(_MD("set_tab_size","spaces"),&RichTextLabel::set_tab_size);
 	ObjectTypeDB::bind_method(_MD("get_tab_size"),&RichTextLabel::get_tab_size);
 
-
 	ObjectTypeDB::bind_method(_MD("set_selection_enabled","enabled"),&RichTextLabel::set_selection_enabled);
 	ObjectTypeDB::bind_method(_MD("is_selection_enabled"),&RichTextLabel::is_selection_enabled);
 

tools/editor/editor_help.cpp

@@ -1097,7 +1097,7 @@ void EditorHelp::_help_callback(const String& p_topic) {
 			line=constant_line[name];
 	}
 
-	class_desc->scroll_to_line(line);
+	class_desc->call_deferred("scroll_to_line", line);
 
 }