PD: Fix assignment of Angle/Growth properties

Depending on the input mode, either `Growth` or `Angle` is used to create
a conical or flat spiral. The respective other can easily be calculated
to give consistent view. This is already done for the other properties,
e.g. `Height` is calculated from `Pitch` and `Turns`.
With this patch, the same is done for `Angle` and `Growth`.

src/Mod/PartDesign/Gui/TaskHelixParameters.cpp

@@ -475,6 +475,8 @@ void TaskHelixParameters::onModeChanged(int index)
     ui->pitch->setValue(propPitch->getValue());
     ui->height->setValue(propHeight->getValue());
     ui->turns->setValue(propTurns->getValue());
+    ui->coneAngle->setValue(propAngle->getValue());
+    ui->growth->setValue(propGrowth->getValue());
 
     recomputeFeature();
     updateUI();