[Python console] add Execute in console context menu item (#18716)

* [Python console] add Execute in console context menu item

* Update src/Gui/PythonEditor.cpp

Co-authored-by: Kacper Donat <kadet1090@gmail.com>

---------

Co-authored-by: Chris Hennes <chennes@pioneerlibrarysystem.org>
Co-authored-by: Kacper Donat <kadet1090@gmail.com>

src/Gui/PythonEditor.h

@@ -60,6 +60,7 @@ public Q_SLOTS:
      * this line is skipped.
      */
     void onUncomment();
+    void onExecuteInConsole();
     void setFileName(const QString&);
     void startDebug();