Added to todo list.
jwjb: The feature is on the todo list, but as it is not an essential feature and that Ashley is developing C2 on his own, he prioritize the features implementations.
This will be addressed/implemented in some release in the future.
Also what you mean by comment looks like the "Toggle disabled" feature that you get when you right click a condition, an event/group or an action.
You also have the condition "System: Is on preview" which will only execute while you're previewing your project but won't execute in an exported project.