Safely add itself as a new module on safe creation.

[skeletor-spaceman]

regarding Test4337ModuleAndHandler even if this is just a test mock contract I feel this is a somewhat sensitive operation, and if used as an example might generate some issues down the road for other modules. taking into account that enableModule functionality might change on newer implementations it'd be safer to use the standard logic and do:

    function enableMyself() public {
        GnosisSafe(payable(address(this))).enableModule(myAddress);
    }

also removing the need to inherit from:

import "../../libraries/SafeStorage.sol";
...
contract Test4337ModuleAndHandler is SafeStorage {

original code for reference. https://github.com/safe-global/safe-contracts/blob/2b7e4c4f8c548dc1b36e06154b0b26c8b5fefb16/contracts/test/4337/Test4337ModuleAndHandler.sol#L57-L64

[mmv08]

Thanks! That's a great suggestion, I don't know what I was thinking 😂