Give user helpful information if they try to open a hidden book

Currently if you try to open a hidden book (e.g., from a link within the app, or from a logosref link on the web or from the web app), you get a tab that is blank except for the error message "You don't have a license to view this resource." This is not technically correct. You own a license for the resource, but it is hidden. Please make that message more appropriate, and offer to unhide the resource for the user. See this thread for more info: https://community.logos.com/forums/p/197157/1142126.aspx