Index: sources/gui/qml/components/SliderCreateTreatment.qml
===================================================================
diff -u -r798ce1a491cd43a3a24fb96f930d4c316add1ff1 -r22ad47530c68333209f2006f54dbdcef9efd20aa
--- sources/gui/qml/components/SliderCreateTreatment.qml	(.../SliderCreateTreatment.qml)	(revision 798ce1a491cd43a3a24fb96f930d4c316add1ff1)
+++ sources/gui/qml/components/SliderCreateTreatment.qml	(.../SliderCreateTreatment.qml)	(revision 22ad47530c68333209f2006f54dbdcef9efd20aa)
@@ -134,18 +134,17 @@
         anchors.leftMargin      : Variables.sliderAdjustButtonLeftMargin
 
         onIncrementValue        : {
-            if ( _slider.isActive) {
-                _slider.incrementValue(true)
-            } else {
+            if (!_slider.active) {
                 setActiveValid()
             }
+            _slider.incrementValue(true)
         }
+
         onDecrementValue        : {
-            if ( _slider.isActive) {
-                _slider.decrementValue(true)
-            } else {
+            if (!_slider.active) {
                 setActiveValid()
             }
+            _slider.decrementValue(true)
         }
     }