Updates for retrieveAppListingFailed error message.

Updated AppsViewPresenter and AppPagedProxy to use retrieveAppListingFailed error message instead of retrieveFolderInfoFailed.
CORE-4719 Added AppGroup sorting to SubmitAppForPublicUseViewImpl.

Added StoreSortInfo to the TreeStore in SubmitAppForPublicUseViewImpl so that App Groups are sorted alphabetically.