refs #751, info if user can directly update models

* modified login component, give hints
* user object has flag for direct write

src/blackmisc/network/authenticateduser.h

@@ -139,6 +139,9 @@ namespace BlackMisc
             //! Enabled
             bool isEnabled() const { return this->m_enabled; }
 
+            //! Entitled to directly update models
+            bool canDirectlyWriteModels() const;
+
             //! \copydoc BlackMisc::Mixin::Icon::toIcon()
             BlackMisc::CIcon toIcon() const;