Only allow selection of tables in Export SQL dialog

Only allow the user to select which tables to export in the Export SQL
dialog instead of tables and views. The selection of views wasn't
respected anyway, so the list including views is just confusing.

src/ExportSqlDialog.cpp

@@ -28,9 +28,9 @@ ExportSqlDialog::ExportSqlDialog(DBBrowserDB* db, QWidget* parent, const QString
     ui->comboOldSchema->setCurrentIndex(Settings::getValue("exportsql", "oldschema").toInt());
 
     // Get list of tables to export
-    objectMap objects = pdb->getBrowsableObjects("main");
-    for(auto it=objects.constBegin();it!=objects.constEnd();++it)
-        ui->listTables->addItem(new QListWidgetItem(QIcon(QString(":icons/%1").arg(sqlb::Object::typeToString((*it)->type()))), (*it)->name()));
+    QList<sqlb::ObjectPtr> objects = pdb->schemata["main"].values("table");
+    for(const sqlb::ObjectPtr& it : objects)
+        ui->listTables->addItem(new QListWidgetItem(QIcon(QString(":icons/%1").arg(sqlb::Object::typeToString(it->type()))), it->name()));
 
     // Sort list of tables and select the table specified in the
     // selection parameter or all tables if table not specified