ui: Added another updateGeometry call to single file view to prevent white space at end and wrong scroll positions

src/lib_gui/qt/element/QtCodeFileSingle.cpp

@@ -216,6 +216,9 @@ void QtCodeFileSingle::showContents()
 	{
 		m_area->show();
 		updateRefCount(m_area->getActiveLocationCount());
+
+		// Resizes the area to fix a bug where the area could be scrolled below the last line.
+		m_area->updateGeometry();
 	}
 }