Topic Editing added to BackOffice

The ability to call up and save AspDotNetStorefront topics is nearing completion in BackOffice. The HTML Editor still needs to be added but finding a decent one for WPF is proving a challenge. I have found a few candidate examples and hope to roll those into a useful tool here that inherits the CSS styles and artefacts of the actual site so that you really see what you get! (Windows Live Writer for blogs is an excellent example of this.)