905
I agree with Mamba.
There is no way to know for sure what a theme is using. Even if the bootstrap js files are present in some directory, that doesn't mean that is what it is loading. Best we could ever do is guess, and that sort of decision needs to be made by the site owner, not some buggy algorithm.
Two other points, the module install and updates are NOT interactive. Both are a single function call that either works or fails. Many things depend on this behavior, and it won't be changing. Also, the themes directory is NOT required to be writable by the web server. This is a very good thing for security. On a well secured XOOPS, you won't be able to copy the files without some extra effort.
This sounds more like education and standardization needs, not a code change.