Further simplify the qml of applicationSwitcherPopup

CURA-8421

resources/qml/ApplicationSwitcher/ApplicationSwitcherPopup.qml

@@ -18,19 +18,11 @@ Popup
     Behavior on opacity { NumberAnimation { duration: 100 } }
     padding: UM.Theme.getSize("wide_margin").width
 
-    contentItem: Item
-    {
-        id: applicationsContainer
-        anchors.fill: parent
-        anchors.margins: UM.Theme.getSize("wide_margin").width
-
-        Grid
+    contentItem: Grid
     {
         id: ultimakerPlatformLinksGrid
         columns: 3
         spacing: UM.Theme.getSize("default_margin").width
-            anchors.top: parent.top
-            anchors.left: parent.left
 
         Repeater
         {
@@ -103,7 +95,6 @@ Popup
             }
         }
     }
-    }
 
     background: UM.PointingRectangle
     {