CORE-5146 CORE-5147 Fix for data caching and lazy-loading.

Added a LoadHandler, based on ChildTreeStoreBinding, that preloads all subfolders returned by the service facade into the Folder TreeStore.
This will prevent a view from firing a Refresh event when lazy-loading a path if some folder isn't already loaded in its TreeStore, even though it may already be cached by the service facade.
Updated DiskResourceRestoreCallback to call the Presenter#doRefresh method, so that a refresh event will fire in order to update the Folder cache.
Further updated lazy-loading logic in SelectFolderByIdLoadHandler and DiskResourcePresenterImpl, started in commit 97c4974c2cb638638e3c61beefa527a094415133.