Implementation of basic permission checks.

core/autoform.h

@@ -41,6 +41,10 @@ public slots:
                 QMessageBox::critical(this, "Database error", msg.toStdString().c_str());
                 m_saved = false;
             });
+            this->connect(service(), &IService::permissionDenied, [this](QString permission) {
+                QMessageBox::critical(this, "Permission denied", permission.toStdString().c_str());
+                m_saved = false;
+            });
             this->connect(service(), &IService::dataChanged, [this]() {
                 m_saved = true;
             });