Snippets Manager - Fatal Error on Saving a snippet

[joy]

@yanno

There may be an issue with the Snippets Manager; in my case, saving the CSS snippets triggers a Fatal Error with a missing “CM_Snippet” class.

Found the bug, looks like an initialisation issue.
Moved class-cm-snippet.php to load before admin components to ensure the class is available for both AJAX operations and snippet execution.