Fix bug: trying to load config for missing module yields FatalErrorException
Fix bug: trying to load config for missing module yields FatalErrorException

when loading a backend url for a module that doesn't exist, without
providing an action, a FatalErrorException occurs, because the config
class we're trying to load doesn't exist.

wengyulin/forkcms,Thijzer/forkcms,tommyvdv/forkcms,sumocoders/forkcms,justcarakas/forkcms,mathiashelin/forkcms,justcarakas/forkcms,Katrienvh/forkcms,jeroendesloovere/forkcms,Katrienvh/forkcms,forkcms/forkcms,jessedobbelaere/forkcms,jeroendesloovere/forkcms,nosnickid/forkcms,forkcms/forkcms,ikoene/forkcms,ikoene/forkcms,carakas/forkcms,Thijzer/forkcms,DegradationOfMankind/forkcms,vytenizs/forkcms,matthiasmullie/forkcms,carakas/forkcms,jonasdekeukelaere/forkcms,matthiasmullie/forkcms,vytenizs/forkcms,forkcms/forkcms,sumocoders/forkcms,jonasdekeukelaere/forkcms,wengyulin/forkcms,sumocoders/forkcms,wengyulin/forkcms,vytsci/forkcms,mathiashelin/forkcms,jonasdekeukelaere/forkcms,sumocoders/forkcms,tommyvdv/forkcms,jacob-v-dam/forkcms,dmoerman/forkcms,bartdc/forkcms,dmoerman/forkcms,justcarakas/forkcms,nosnickid/forkcms,carakas/forkcms,tommyvdv/forkcms,riadvice/forkcms,DegradationOfMankind/forkcms,carakas/forkcms,jeroendesloovere/forkcms,jonasdekeukelaere/forkcms,vytsci/forkcms,ikoene/forkcms,DegradationOfMankind/forkcms,jacob-v-dam/forkcms,vytenizs/forkcms,nosnickid/forkcms,mathiashelin/forkcms,Katrienvh/forkcms,riadvice/forkcms,tommyvdv/forkcms,bartdc/forkcms,mathiashelin/forkcms,bartdc/forkcms,riadvice/forkcms,Thijzer/forkcms,jacob-v-dam/forkcms,jonasdekeukelaere/forkcms,sumocoders/forkcms,jessedobbelaere/forkcms,matthiasmullie/forkcms,Katrienvh/forkcms,dmoerman/forkcms,vytsci/forkcms,riadvice/forkcms,DegradationOfMankind/forkcms,jacob-v-dam/forkcms,forkcms/forkcms,jeroendesloovere/forkcms,jessedobbelaere/forkcms,carakas/forkcms,jessedobbelaere/forkcms