Added rendering abilities to hotCoreClientFiles
Code tidy up
No need to export data-gathering functions
Changed clientPaths into clientPath, no point in having more than one public path per module, especially now that users can define which files to render
Select items need to be ALL preloaded beforehand, overlay goes away once dgrid is ready.  Fix StoreSelect and EditableList so that they are overlayed properly. With "refreshData", change "refresh" to clickable overlay. catch dgrid errors with overlay if necessary. Improve overlay: "Loading", "ClickToReload" (with icons accordingly), make the dgrid widgets use it