Show a placeholder message if there are no extensions

src/roominfo/WidgetsPage.qml

@@ -19,10 +19,15 @@ Kirigami.ScrollablePage {
 
     ListView {
         id: extView
-        visible: extView.count !== 0
 
         currentIndex: -1
 
+        Kirigami.PlaceholderMessage {
+            anchors.centerIn: parent
+            text: i18nc("@placeholder", "This room does not use any extensions")
+            visible: extView.count === 0
+        }
+
         model: WidgetModel {
             id: widgetModel
             room: root.room
@@ -67,10 +72,4 @@ Kirigami.ScrollablePage {
             onClicked: Qt.openUrlExternally(url)
         }
     }
-
-    Kirigami.PlaceholderMessage {
-        text: i18nc("@info:placeholder", "There are no extensions in this room.")
-        visible: extView.count === 0
-        anchors.centerIn: parent
-    }
 }