Comment Command Blocks

Sometimes when working with command blocks, you may want to remove a command from the chain without having to break and move the whole line. Like you're able to make commands conditional, you should be able to make commands "commented" (like how you can comment out lines to test code).
When a command block is commented, its arrow on the texture turns into an X. If you comment an impulse or repeating command block, it can accept redstone and fire connected chain command blocks, but it won't fire the command. Commented chain command blocks let the chain continue without firing its command.
This addition would make it easier to test commands without having to break things and move commands around.