Added some missing widths en heights

GammaRay complained about some objects not having a size

resources/qml/JobSpecs.qml

@@ -18,6 +18,7 @@ Item {
     UM.I18nCatalog { id: catalog; name:"cura"}
 
     height: childrenRect.height
+    width: childrenRect.width
 
     Connections
     {

resources/qml/Toolbar.qml

@@ -30,7 +30,8 @@ Item
             id: repeat
 
             model: UM.ToolModel { }
-
+            width: childrenRect.width
+            height: childrenRect.height
             Button
             {
                 text: model.name
@@ -72,6 +73,8 @@ Item
         Repeater
         {
             id: extruders
+            width: childrenRect.width
+            height: childrenRect.height
             property var _model: Cura.ExtrudersModel { id: extrudersModel }
             model: _model.items.length > 1 ? _model : 0
             ExtruderButton { extruder: model }

resources/qml/Topbar.qml

@@ -279,7 +279,8 @@ Rectangle
 
         property var buttonTarget: Qt.point(viewModeButton.x + viewModeButton.width / 2, viewModeButton.y + viewModeButton.height / 2)
 
-        height: childrenRect.height;
+        height: childrenRect.height
+        width: childrenRect.width
 
         source: UM.ActiveView.valid ? UM.ActiveView.activeViewPanel : "";
     }