Fix a few minor qml warnings

src/app/qml/KeyVerificationDialog.qml

@@ -1,6 +1,8 @@
 // SPDX-FileCopyrightText: 2022 Tobias Fella <tobias.fella@kde.org>
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+pragma ComponentBehavior: Bound
+
 import QtQuick
 import QtQuick.Controls as QQC2
 import QtQuick.Layouts
@@ -8,7 +10,6 @@ import QtQuick.Window
 import QtQml
 
 import org.kde.kirigami as Kirigami
-import org.kde.kirigamiaddons.delegates as Delegates
 import org.kde.neochat
 
 Kirigami.Page {