Completion: Add background

src/contents/ui/Completion.qml

@@ -28,6 +28,10 @@ import org.kde.kirigami 2.5 as Kirigami
 Controls.ScrollView {
     id: completion
 
+    background: Rectangle {
+        color: Kirigami.Theme.backgroundColor
+    }
+
     property string searchText
     property alias model: listView.model
     property alias count: listView.count

src/contents/ui/webbrowser.qml

@@ -318,6 +318,9 @@ Kirigami.ApplicationWindow {
 
         Completion {
             id: completion
+
+            z: -1
+
             model: UrlFilterProxyModel {
                 id: urlFilter
                 sourceModel: browserManager.history