Rename class within the editor

[andresbrx]

Description

It would be really nice and practical to be able to rename a class while I'm building a page.

References:

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[diggeddy]

Under Review
Renaming classes requires careful consideration, which is why we keep it in the admin settings out of harms way.
The issue; renaming the class will break its style attachment for any block using the old class.

To fix that would require manually updating the classes on every block or searching and replacing them in the database.
Neither of which anyone wants to be doing.

Perhaps ; if the class has no styles attached it should be allowed ?