Repair that arrow keys actually trigger a scale update

CHANGELOG

@@ -5,6 +5,7 @@ Add switch group places to song-structure context menus.
 Add View-Menu with options to maximize the two editor areas.
 Add advanced feature for a global rhythm offset, meant for Jack-Transport. Allows the whole piece to begin later on the jack-timeline.
 Add track groups, which double as midi bus. This enhances overview for more complex projects.
+Add option to follow the playhead in pattern view (or not), required by the much longer patterns. Also better scrolling and playhead is always visible now.
 
 2021-01-15 Version 2.0.0
 Big new features increase the MAJOR version. Old save files can still be loaded.

qtgui/pattern_grid.py

@@ -933,11 +933,13 @@ class PitchWidget(QtWidgets.QGraphicsProxyWidget):
 
     def spinBoxValueChanged(self):
         self.label.setText(self.midiToNotename(self.spinBox.value()))
-        #self.parentItem.sendToEngine(callback=False) # results in a loop with callback, and in wrong data without. This is not the right place to implement immediate note feedback while editing is still going on.
+        self.blockSignals(True)
+        self.spinBoxEditingFinished(callback=False)
+        self.blockSignals(False)
 
-    def spinBoxEditingFinished(self):
+    def spinBoxEditingFinished(self, callback=True):
         if not self.rememberLastValue == self.spinBox.value():
-            self.parentItem.sendToEngine()
+            self.parentItem.sendToEngine(callback)
             self.rememberLastValue = self.spinBox.value()
 
     def stepBy(self, n):