remove virtual from MainWindow class

it is veeerryy unlikely anyone will ever extend this class

src/MainWindow.h

@@ -112,61 +112,61 @@ protected:
     void resizeEvent(QResizeEvent *event);
 
 public slots:
-    virtual bool fileOpen(const QString& fileName);
-    virtual void logSql(const QString &sql, int msgtype);
-    virtual void dbState(bool dirty);
-    virtual void browseRefresh();
+    bool fileOpen(const QString& fileName);
+    void logSql(const QString &sql, int msgtype);
+    void dbState(bool dirty);
+    void browseRefresh();
 
 private slots:
-    virtual void createTreeContextMenu(const QPoint & qPoint);
-    virtual void changeTreeSelection();
-    virtual void fileOpen();
-    virtual void fileNew();
-    virtual void populateStructure();
-    virtual void populateTable(const QString& tablename);
-    virtual void resetBrowser();
-    virtual void fileClose();
-    virtual void addRecord();
-    virtual void deleteRecord();
-    virtual void selectTableLine( int lineToSelect );
-    virtual void navigatePrevious();
-    virtual void navigateNext();
-    virtual void navigateGoto();
-    virtual void setRecordsetLabel();
-    virtual void createTable();
-    virtual void createIndex();
-    virtual void compact();
-    virtual void deleteObject();
-    virtual void editTable();
-    virtual void helpWhatsThis();
-    virtual void helpAbout();
-    virtual void updateRecordText(int row, int col, const QByteArray& newtext);
-    virtual void editWinAway();
-    virtual void editText(const QModelIndex& index);
-    virtual void doubleClickTable(const QModelIndex& index);
-    virtual void executeQuery();
-    virtual void importTableFromCSV();
-    virtual void exportTableToCSV();
-    virtual void fileSave();
-    virtual void fileRevert();
-    virtual void exportDatabaseToSQL();
-    virtual void importDatabaseFromSQL();
-    virtual void openPreferences();
-    virtual void openRecentFile();
-    virtual void loadPragmas();
-    virtual void updatePragmaUi();
-    virtual void savePragmas();
-    virtual void mainTabSelected( int tabindex );
-    virtual void browseTableHeaderClicked(int logicalindex);
-    virtual void createSyntaxHighlighters();
-    virtual unsigned int openSqlTab(bool resetCounter = false);
-    virtual void closeSqlTab(int index, bool force = false);
-    virtual void openSqlFile();
-    virtual void saveSqlFile();
-    virtual void loadExtension();
-    virtual void reloadSettings();
-    virtual void httpresponse(QNetworkReply* reply);
-    virtual void updatePlot(SqliteTableModel* model, bool update = true);
+    void createTreeContextMenu(const QPoint & qPoint);
+    void changeTreeSelection();
+    void fileOpen();
+    void fileNew();
+    void populateStructure();
+    void populateTable(const QString& tablename);
+    void resetBrowser();
+    void fileClose();
+    void addRecord();
+    void deleteRecord();
+    void selectTableLine( int lineToSelect );
+    void navigatePrevious();
+    void navigateNext();
+    void navigateGoto();
+    void setRecordsetLabel();
+    void createTable();
+    void createIndex();
+    void compact();
+    void deleteObject();
+    void editTable();
+    void helpWhatsThis();
+    void helpAbout();
+    void updateRecordText(int row, int col, const QByteArray& newtext);
+    void editWinAway();
+    void editText(const QModelIndex& index);
+    void doubleClickTable(const QModelIndex& index);
+    void executeQuery();
+    void importTableFromCSV();
+    void exportTableToCSV();
+    void fileSave();
+    void fileRevert();
+    void exportDatabaseToSQL();
+    void importDatabaseFromSQL();
+    void openPreferences();
+    void openRecentFile();
+    void loadPragmas();
+    void updatePragmaUi();
+    void savePragmas();
+    void mainTabSelected( int tabindex );
+    void browseTableHeaderClicked(int logicalindex);
+    void createSyntaxHighlighters();
+    unsigned int openSqlTab(bool resetCounter = false);
+    void closeSqlTab(int index, bool force = false);
+    void openSqlFile();
+    void saveSqlFile();
+    void loadExtension();
+    void reloadSettings();
+    void httpresponse(QNetworkReply* reply);
+    void updatePlot(SqliteTableModel* model, bool update = true);
     void on_treePlotColumns_itemChanged(QTreeWidgetItem *item, int column);
     void on_treePlotColumns_itemDoubleClicked(QTreeWidgetItem *item, int column);
     void on_butSavePlot_clicked();