- GUI: fixed initial of heatrate

- added constants for DT

brewpi_gui.py

@@ -44,6 +44,7 @@ class Window(QtWidgets.QMainWindow, Ui_MainWindow):
 		self.slider_pwr_initial_update = True
 		self.slider_temp_soll_initial_update = True
 		self.checkbox_heater_activate_initial_update = True
+		self.heatrate_soll_initial_update = True
 		self.ws_client.connect(uri="ws://localhost:8765")
 
 	def disconnect(self):