Move TopBar to the Skeleton folder.

Clean up the Cura.qml even more by moving some components to the
ApplicationMenu, where they are called.

Contributes to CURA-5784.

resources/qml/Cura.qml

@@ -183,7 +183,6 @@ UM.MainWindow
                     bottom: parent.bottom;
                     left: parent.left;
                 }
-
             }
 
             Topbar
@@ -340,13 +339,6 @@ UM.MainWindow
         }
     }
 
-    WorkspaceSummaryDialog
-    {
-        id: saveWorkspaceDialog
-        property var args
-        onYes: UM.OutputDeviceManager.requestWriteToDevice("local_file", PrintInformation.jobName, args)
-    }
-
     Connections
     {
         target: Cura.Actions.preferences
@@ -359,33 +351,6 @@ UM.MainWindow
         onShowPreferencesWindow: preferences.visible = true
     }
 
-    MessageDialog
-    {
-        id: newProjectDialog
-        modality: Qt.ApplicationModal
-        title: catalog.i18nc("@title:window", "New project")
-        text: catalog.i18nc("@info:question", "Are you sure you want to start a new project? This will clear the build plate and any unsaved settings.")
-        standardButtons: StandardButton.Yes | StandardButton.No
-        icon: StandardIcon.Question
-        onYes:
-        {
-            CuraApplication.deleteAll();
-            Cura.Actions.resetProfile.trigger();
-        }
-    }
-
-    Connections
-    {
-        target: Cura.Actions.newProject
-        onTriggered:
-        {
-            if(Printer.platformActivity || Cura.MachineManager.hasUserSettings)
-            {
-                newProjectDialog.visible = true
-            }
-        }
-    }
-
     Connections
     {
         target: Cura.Actions.addProfile

resources/qml/Skeleton/ApplicationMenu.qml

@@ -11,10 +11,18 @@ import UM 1.3 as UM
 import Cura 1.1 as Cura
 
 import "../Menus"
+import "../Dialogs"
+
+Item
+{
+    id: menu
+    width: applicationMenu.width
+    height: applicationMenu.height
+    property alias window: applicationMenu.window
 
     UM.ApplicationMenu
     {
-    id: menu
+        id: applicationMenu
 
         Menu
         {
@@ -232,3 +240,38 @@ UM.ApplicationMenu
             MenuItem { action: Cura.Actions.about }
         }
     }
+
+    WorkspaceSummaryDialog
+    {
+        id: saveWorkspaceDialog
+        property var args
+        onYes: UM.OutputDeviceManager.requestWriteToDevice("local_file", PrintInformation.jobName, args)
+    }
+
+    MessageDialog
+    {
+        id: newProjectDialog
+        modality: Qt.ApplicationModal
+        title: catalog.i18nc("@title:window", "New project")
+        text: catalog.i18nc("@info:question", "Are you sure you want to start a new project? This will clear the build plate and any unsaved settings.")
+        standardButtons: StandardButton.Yes | StandardButton.No
+        icon: StandardIcon.Question
+        onYes:
+        {
+            CuraApplication.deleteAll();
+            Cura.Actions.resetProfile.trigger();
+        }
+    }
+
+    Connections
+    {
+        target: Cura.Actions.newProject
+        onTriggered:
+        {
+            if(Printer.platformActivity || Cura.MachineManager.hasUserSettings)
+            {
+                newProjectDialog.visible = true
+            }
+        }
+    }
+}

resources/qml/Skeleton/Topbar.qml

@@ -1,4 +1,4 @@
-// Copyright (c) 2017 Ultimaker B.V.
+// Copyright (c) 2018 Ultimaker B.V.
 // Cura is released under the terms of the LGPLv3 or higher.
 
 import QtQuick 2.2
@@ -8,7 +8,6 @@ import QtQuick.Layouts 1.1
 
 import UM 1.4 as UM
 import Cura 1.0 as Cura
-import "Menus"
 
 Rectangle
 {