Index: sources/gui/qml/components/HeaderBar.qml
===================================================================
diff -u -rbcff4a1a40c45dd68860d9e3aec12c602f19f3ac -ra2f4636c3ecf98ec1e38f812f4602e0d67d4b7bf
--- sources/gui/qml/components/HeaderBar.qml	(.../HeaderBar.qml)	(revision bcff4a1a40c45dd68860d9e3aec12c602f19f3ac)
+++ sources/gui/qml/components/HeaderBar.qml	(.../HeaderBar.qml)	(revision a2f4636c3ecf98ec1e38f812f4602e0d67d4b7bf)
@@ -18,11 +18,7 @@
         GradientStop { position: 0.8; color: Qt.darker (Colors.backgroundMain, 1.2) }
     }
 
-    function openDialog ( button, dialog ) {
-        var globalPoint = button.mapToGlobal(button.width , 0); // get coordinate of button
-        dialog.x = globalPoint.x - dialog.width                 // position dialog
-        dialog.open()                                           // open dialog
-    }
+    function positionDialog ( button, dialog ) { return button.mapToItem(null, button.width, 0).x - dialog.width }
 
     Item { id: _dateTimeItem
         width   : Variables.headerBarDateTimeWidth
@@ -131,7 +127,7 @@
             iconImageSource : "qrc:/images/iWifi"
             extraSpace      : _headerButtonRow.spacing
 
-            onPressed       : openDialog(_wifiButton,  _wifiDialog)
+            onPressed       : _wifiDialog.open()
         }
 
         IconButton { id  : _bluetoothButton
@@ -175,5 +171,5 @@
         }
     }
 
-    WiFiDialog      { id: _wifiDialog      }
+    WiFiDialog      { id: _wifiDialog;  x: positionDialog(_wifiButton, _wifiDialog) }
 }