fix: deactivate edit controller shouldn't throw when active is null

[ghiscoding]

it had errors thrown when using autoEdit and setActiveCell which calls makeActiveCellNormal which calls deactivate which finally throws that error even when the active edit controller is null but that shouldn't matter if it is already null then we shouldn't care and not throw

[ghiscoding]

@6pac I'm not planning any other code change and this error thrown is blocking me from releasing a new version in my libs, so if you could release a new version in coming days that would be awesome. Thanks mate