Index: sources/gui/qml/compounds/ValueAdjuster.qml
===================================================================
diff -u -r9c818f9b2600fa0fb9375f5923bf01ffcbb17e0f -r5d7e02ed6481cc6ae1c944a5ba1687766f7f8375
--- sources/gui/qml/compounds/ValueAdjuster.qml	(.../ValueAdjuster.qml)	(revision 9c818f9b2600fa0fb9375f5923bf01ffcbb17e0f)
+++ sources/gui/qml/compounds/ValueAdjuster.qml	(.../ValueAdjuster.qml)	(revision 5d7e02ed6481cc6ae1c944a5ba1687766f7f8375)
@@ -29,17 +29,17 @@
     property real   actualValue : 0
     property bool   isActive    : false
     property bool   editable    : true
-    property bool   canAllowOff : false
+    property bool   canOff : false
     property bool   canRefresh  : false
 
     // fix floating-point precision issue
     readonly property real stepVal  : Math.round(step       * 100) / 100
     readonly property real minVal   : Math.round(minimum    * 100) / 100
     readonly property real val      : Math.round(value      * 100) / 100
 
-    readonly property bool canIncrement  : isActive ? value < maximum : true
-    readonly property bool canDecrement  : isActive ? canAllowOff ? value > 0 :
-                                                                    value > minimum : true
+    readonly property bool canIncrement  : isActive ? value  < maximum : true
+    readonly property bool canDecrement  : isActive ? canOff ? value > 0 :
+                                                               value > minimum : true
 
     onIsActiveChanged             : {
         if ( canRefresh )   { canRefresh = false; return;               }
@@ -52,24 +52,24 @@
     function clear() { _root.isActive = false                           }
 
     function increment() {
-        if ( ! isActive )     { isActive = true; return;                }
+        if ( ! isActive )   { isActive = true; return;                      }
 
-        if ( canAllowOff )  { value = val < minVal ? minVal : val + stepVal }
+        if ( canOff )       { value = val < minVal ? minVal : val + stepVal }
         else                { value += stepVal                              }
     }
 
     function decrement() {
-        if ( ! isActive )     { isActive = true; return;                    }
+        if ( ! isActive )   { isActive = true; return;                      }
 
-        if ( canAllowOff )  { value = val > minVal ? val - stepVal : 0      }
+        if ( canOff )       { value = val > minVal ? val - stepVal : 0      }
         else                { value -= stepVal                              }
     }
 
     Text { id: _text
         anchors.centerIn: parent
-        text            : _root.isActive ? _root.canAllowOff ? _root.value === 0 ?
-                                                                "OFF" :
-                                                                _root.value.toFixed( _root.decimal ) :
+        text            : _root.isActive ? _root.canOff ? _root.value === 0 ?
+                                                          "OFF" :
+                                                          _root.value.toFixed( _root.decimal ) :
                                         _root.value.toFixed( _root.decimal ) : Variables.emptyEntry
         color           : Colors.offWhite
         font.pixelSize  : Fonts.fontPixelValueControl