Index: sources/gui/qml/pages/settings/SettingsDeviceRegistration.qml
===================================================================
diff -u -rd862dfcd402206e33b314c458e41c13b684a4565 -rb12cc2840bb819c5222bfd3bc2cc5ca6eb4c37fd
--- sources/gui/qml/pages/settings/SettingsDeviceRegistration.qml	(.../SettingsDeviceRegistration.qml)	(revision d862dfcd402206e33b314c458e41c13b684a4565)
+++ sources/gui/qml/pages/settings/SettingsDeviceRegistration.qml	(.../SettingsDeviceRegistration.qml)	(revision b12cc2840bb819c5222bfd3bc2cc5ca6eb4c37fd)
@@ -14,7 +14,7 @@
  */
 
 // Qt
-import QtQuick 2.12
+import QtQuick
 
 // Project
 import Gui.Actions 0.1
@@ -39,24 +39,22 @@
     readonly property int       spacing         : 20
     readonly property int       leftMargin      : 100
     readonly property int       rightMargin     : 150
-    readonly property int       topMargin       : topMarginContent
+    readonly property int       topMargin       : 200
     readonly property int       separatorGap    : 40
     readonly property string    separatorText   : ":"
 
     property alias              isRegistered    : _checkListView.completeVisible
-    property var                ipValidator     : RegExpValidator {
-        regExp:/^(([01]?[0-9]?[0-9]|2([0-4][0-9]|5[0-5]))\.){3}([01]?[0-9]?[0-9]|2([0-4][0-9]|5[0-5]))$/
+    property var                ipValidator     : RegularExpressionValidator {
+        regularExpression:/^(([01]?[0-9]?[0-9]|2([0-4][0-9]|5[0-5]))\.){3}([01]?[0-9]?[0-9]|2([0-4][0-9]|5[0-5]))$/
     }
 
     onVisibleChanged: {
         if ( visible ) vAdjustmentVersions     .doAdjustment()
     }
 
-    Column { id             : _column
+    contentItem: Column { id             : _column
         spacing             : _root.spacing
-        y                   : _root.topMargin
-        anchors.left        : parent.left
-        anchors.leftMargin  : _root.leftMargin
+        anchors.fill: parent
 
         TextEntry { id      : _version_UI
             textInput.clip  : true
@@ -68,6 +66,7 @@
             separator.width : _root.separatorGap
             textInput.width : _root.entryWidth
             label.width     : _root.labelWidth
+            anchors.horizontalCenter: parent.horizontalCenter
         }
 
         TextEntry { id      : _serial_TD
@@ -80,6 +79,7 @@
             separator.width : _root.separatorGap
             textInput.width : _root.entryWidth
             label.width     : _root.labelWidth
+            anchors.horizontalCenter: parent.horizontalCenter
         }
 
         TextEntry { id      : _serial_DD
@@ -92,6 +92,7 @@
             separator.width : _root.separatorGap
             textInput.width : _root.entryWidth
             label.width     : _root.labelWidth
+            anchors.horizontalCenter: parent.horizontalCenter
         }
 
         TextEntry { id      : _ipAddress_wlan0
@@ -105,6 +106,7 @@
             textInput.width : _root.entryWidth
             label.width     : _root.labelWidth
             validator       : _root.ipValidator
+            anchors.horizontalCenter: parent.horizontalCenter
         }
 
         TextEntry { id      : _ipAddress_eth0
@@ -118,6 +120,7 @@
             textInput.width : _root.entryWidth
             label.width     : _root.labelWidth
             validator       : _root.ipValidator
+            anchors.horizontalCenter: parent.horizontalCenter
         }
     }
 
@@ -145,16 +148,16 @@
             let mHasNetworkConnection   = (_ipAddress_eth0.isValid || _ipAddress_wlan0.isValid)
             if ( ! mHasNetworkConnection) { _root.notificationText = qsTr("No Network Connection"); return }
 
-            let mHasSerials             = ( _serial_TD != "" && _serial_DD != "")
+            let mHasSerials             = ( _serial_TD !== "" && _serial_DD !== "")
             if ( ! mHasSerials          ) { _root.notificationText = qsTr("No device Serial"     ); return }
             vCloudSync              .doRegister  ()
         } // start device registration
     }
 
     Connections { target: vCloudSync
-        function onisRunningEntered         ( vValue ) { _checkListView.checkList.setItemExt( 0, true         )}
-        function onisRegisterStartEntered   ( vValue ) { _checkListView.checkList.setItemExt( 1, true         )}
-        function onisRegisterDoneEntered    ( vValue ) { _checkListView.checkList.setItemExt( 1, vValue       )}
+        function onIsRunningEntered         ( vValue ) { _checkListView.checkList.setItemExt( 0, true         )}
+        function onIsRegisterStartEntered   ( vValue ) { _checkListView.checkList.setItemExt( 1, true         )}
+        function onIsRegisterDoneEntered    ( vValue ) { _checkListView.checkList.setItemExt( 1, vValue       )}
     }
 
     notificationText: ""