Translate class members lazily
Translate class members lazily

Since these lines are actually evaluated at build/startup time, we need
to defer the translation until runtime.

Otherwise, later versions of Django throw a fit:

> AppRegistryNotReady: The translation infrastructure cannot be
> initialized before the apps registry is ready. Check that you don't
> make non-lazy gettext calls at import time.

Stanford-Online/xblock-image-modal,Stanford-Online/xblock-image-modal,Stanford-Online/xblock-image-modal