Code was assuming that FRAMEWORK_DIR would always have a value. If it
doesn’t (because you’re running a test instance of a naked framework)
This caused URLs to be treated as root relative, which creates some
duplicate-inclusion bugs.
The use of ltrim() works, but is a bit clumsy. A more flexible approach
to including front-end assets of given modules would be preferable;
ideally something that also let you keep your code outside of the
web root.
We've removed the ability to directly reference JS and CSS files
for form fields and other SilverStripe features in favour of a common bundle built by Webpack.
The logical next step is to make the framework module free of frontend dependencies,
which should simplify its operation, and avoid another time intensive "npm install" on a module.
Used in iframe, so can't be rolled into other code.
Moved in admin/ since that's easier for now with Webpack entry points,
and we'll move all JS/CSS into admin/ anyway soon.
