Made On clonable.

[StarArawn]

Its useful when you are building out a UI and need to pass a bundle down the tree to spawned later on.

Edge cases:

1. If a user clones a system and it has not initialized it should be good.
2. If a user clones a system and it has been initialized they are fine as long as it doesn't run twice in the same frame.
3. If a user doesn't meet 1 or 2 they'll like run into weird change detection behavior and event behavior.