[*] Fixed item redefinition error.

DapScreenForm.ui.qml

@@ -5,13 +5,18 @@ Rectangle {
     id: dapFrame
 
     property alias frame: dapFrame
-    property Item contenetItemScreen: Item { }
+    property Item contenetItemScreen
 
     anchors.fill: parent
 
-    Item
-    {
+    Item {
         id: contenetItemScreen
         data: contenetItemScreen
     }
 }
+
+/*##^##
+Designer {
+    D{i:0;autoSize:true;height:480;width:640}
+}
+##^##*/

DapTabForm.ui.qml

@@ -2,10 +2,10 @@ import QtQuick 2.4
 import QtQuick.Controls 2.0
 
 Page {
-    property DapTopPanelForm topPanelForm: DapTopPanelForm { }
-    property DapScreenForm screenForm: DapScreenForm { }
+    property DapTopPanelForm topPanelForm
+    property DapScreenForm screenForm
     property alias separator: dapSeparator
-    property DapRightPanelForm rightPanelForm: DapRightPanelForm { }
+    property DapRightPanelForm rightPanelForm
 
     anchors.fill: parent