Fix mouseMoveEvent selection rectangle

Qt6 no longer accepts the same type of argument
for the scene setSelectionArea. This commit fixes
the issue by just falling back to the default
selection rectangle behaviour which is the same
as the intended behaviour on previous
implementation.

Author: jdrese

NodeGraphQt/widgets/viewer.py

@@ -617,9 +617,7 @@ def mouseMoveEvent(self, event):
                 path = QtGui.QPainterPath()
                 path.addRect(map_rect)
                 self._rubber_band.setGeometry(rect)
-                self.scene().setSelectionArea(
-                    path, QtCore.Qt.IntersectsItemShape
-                )
+                self.scene().setSelectionArea(path)
                 self.scene().update(map_rect)
 
                 if self.SHIFT_state or self.CTRL_state: