If a showcase is causing an error - log out which showcase file is causing the error

[L0wry]

component loader should be able to handle a showcase file without a default, and when a showcase file causes an error, we should be able to log this out somehow. I'd imagine we need to tell the client somehow

lib-904da1664780380f.js:1 Uncaught TypeError: Cannot read property 'filter' of undefined
at lib-904da1664780380f.js:1
at Array.forEach ()
at t.default (lib-904da1664780380f.js:1)
at lib-904da1664780380f.js:1
at _ (lib-904da1664780380f.js:1)
at R (lib-904da1664780380f.js:1)
at c (lib-904da1664780380f.js:1)
at f (lib-904da1664780380f.js:1)
at HTMLUnknownElement.l (lib-904da1664780380f.js:1)
at Object.Oo (lib-904da1664780380f.js:1)