Fix header loading when not in a book
Fix header loading when not in a book

katalysteducation/webview,Connexions/webview,Connexions/webview,dak/webview,katalysteducation/webview,Connexions/webview,katalysteducation/webview,dak/webview,dak/webview,katalysteducation/webview,Connexions/webview