Display correct plugin description for "View details" modal

[viktorix]

When a CP plugin is listed in the WP directory, clicking on the "View details" link on the Plugins page will display WP repo information because the slug is the same. For these instances, we need to display CP directory's plugin description if it was installed using CP directory integration.

Should we track this in a db table as a boolean cp_directory value for each plugin/theme and set it to true when it's installed using CP directory integration? It can be used/checked later as needed, especially when slugs between WP/CP repos are identical.