One scheme (LESS for instance) may depends on other schemes (LESS depends on Default and CSS).
You should add those schemes to your scheme book too.
You can find other related schemes from links at the breadcrumb navigation.
And I will add dependencies to the scheme page.
About the "Save as...", as you know, I've implemented it. If you do wanna it now, you can checkout from git and build the plugin yourself. I will release it when I finished the server part (let you upload your changes).
Best regards,
IL