Installing Extensions Via CLI Broken

The new extension not enable able error message feature was broken when added to the CLI system.

Now, the CLI will install any extension even if the extension is not enable able, if it uses the new error messages instead of the traditional false boolean.

This is because the changes for the new error messages in the CLI were put in the wrong place (they were added to where the code checks if an extension is installed already prior to disabling, rather than to where the code checks if an extension is enable able).