Lower step length in update frequency

source/RobotAPI/libraries/armem_gui/PeriodicUpdateWidget.cpp

@@ -28,7 +28,7 @@ namespace armarx::armem::gui
         _frequencySpinBox->setValue(frequency);
         _frequencySpinBox->setMinimum(0);
         _frequencySpinBox->setMaximum(maxFrequency);
-        _frequencySpinBox->setSingleStep(1.0);
+        _frequencySpinBox->setSingleStep(0.5);
         _frequencySpinBox->setSuffix(" Hz");