rethink choices of 0c7ca0b9ba; minimum selection at least should work, cf. #166

src/gui_qt/graphs/graphwindow.py

@@ -55,11 +55,16 @@ class QGraphWindow(QtWidgets.QGraphicsView, Ui_GraphWindow):
         self._external_items = []
         self.closable = True
 
+        """
+        TODO 
+        this does not work properly and leads to lots of errors
+        because PlotDataItems do not have a viewBox anymore which is called in getData
+        
         # desperate attempts to improve memory usage during paintEvents
         self.graphic.setAntialiasing(False)
         self.plotItem.setDownsampling(auto=True)
         self.plotItem.setClipToView(True)
-
+        """
         self._block = False
 
         self.log = [False, False]