Index: sources/gui/qml/components/BaseComboBox.qml
===================================================================
diff -u -r10d95daf091fedda008906727088648f66ae5bac -rb12853c86ef9e517667516dc3e47bca07349cedf
--- sources/gui/qml/components/BaseComboBox.qml	(.../BaseComboBox.qml)	(revision 10d95daf091fedda008906727088648f66ae5bac)
+++ sources/gui/qml/components/BaseComboBox.qml	(.../BaseComboBox.qml)	(revision b12853c86ef9e517667516dc3e47bca07349cedf)
@@ -28,25 +28,29 @@
     property alias dropDownWidth    : _popup.width
     property int  delegateWidth     : dropDownWidth
     property int  delegateHeight    : height
+    property bool   canOff          : false
+    property bool centerHorizontally: false
 
+
     width                   : 300
     displayText             : _root.isActive ? currentText : Variables.emptyEntry
     currentIndex            : 0
     font.pixelSize          : Fonts.fontPixelTextRectTitle
-    leftPadding             : 30
+    leftPadding             : centerHorizontally || ! _root.isActive ? 30 : 10
 
     signal clear()
 
-    onClear                 : {
-        currentIndex    = 0
-    }
+    onClear                 : { currentIndex    = 0 }
 
     contentItem: Text { id: _displayText
-        text                : parent.displayText
+        text                : canOff && parent.displayText === "0" ? qsTr("OFF") : parent.displayText
         color               : Colors.offWhite
         font.pixelSize      : _root.isActive ? Fonts.fontPixelTextRectTitle : Fonts.fontPixelValueControl
         verticalAlignment   : Text.AlignVCenter
-        horizontalAlignment : _root.isActive ? undefined : Text.AlignHCenter
+        horizontalAlignment : centerHorizontally || ! _root.isActive ? Text.AlignHCenter : undefined
+        rightPadding        : _root.isActive ? 15 : 0
+        clip                : true
+        elide               : Text.ElideRight
     }
 
     background: Rectangle { id: _background
@@ -60,11 +64,13 @@
         highlighted : _root.highlightedIndex === index
 
         contentItem: Text {
-            text                : modelData
+            text                : canOff && modelData === "0" ? qsTr("OFF") :  modelData
             color               : Colors.offWhite
             font                : _root.font
             verticalAlignment   : Text.AlignVCenter
-            leftPadding         : 30
+            horizontalAlignment : centerHorizontally ? Text.AlignHCenter : undefined
+            leftPadding         : 10
+            elide               : Text.ElideRight
         }
 
         background: Rectangle {