Fix a few minor qml warnings

src/app/qml/AccountMenu.qml

@@ -97,9 +97,9 @@ KirigamiComponents.ConvergentContextMenu {
         text: i18nc("@action:inmenu Open support dialog", "Support")
         icon.name: "help-contents-symbolic"
         onTriggered: {
-            Qt.createComponent("org.kde.neochat", "SupportDialog").createObject(QQC2.Overlay.overlay, {
+            (Qt.createComponent("org.kde.neochat", "SupportDialog").createObject(QQC2.Overlay.overlay, {
                 connection: root.connection,
-            }).open();
+            }) as SupportDialog).open();
         }
     }
 

src/app/qml/ChooseRoomDialog.qml

@@ -4,9 +4,6 @@
 pragma ComponentBehavior: Bound
 
 import QtQuick
-import QtQuick.Controls
-
-import org.kde.kirigami as Kirigami
 
 import org.kde.neochat
 

src/app/qml/CollapsedRoomDelegate.qml

@@ -3,8 +3,6 @@
 
 import QtQuick
 import QtQuick.Controls as QQC2
-import QtQuick.Layouts
-import QtQml.Models
 
 import org.kde.kirigami as Kirigami
 import org.kde.kirigamiaddons.labs.components as KirigamiComponents

src/app/qml/ExplorerDelegate.qml

@@ -9,8 +9,6 @@ import org.kde.kirigami as Kirigami
 import org.kde.kirigamiaddons.delegates as Delegates
 import org.kde.kirigamiaddons.labs.components as Components
 
-import org.kde.neochat
-
 Delegates.RoundedItemDelegate {
     id: root
 

src/app/qml/InvitationView.qml

@@ -166,7 +166,7 @@ ColumnLayout {
     }
 
     RowLayout {
-        visible: root.currentRoom.connection.canCheckMutualRooms
+        visible: (root.currentRoom.connection as NeoChatConnection).canCheckMutualRooms
         spacing: 0
 
         Layout.topMargin: Kirigami.Units.largeSpacing * 2

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 {

src/app/qml/LocationChooser.qml

@@ -2,8 +2,6 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 import QtQuick
-import QtQuick.Controls
-import QtQuick.Layouts
 import QtLocation
 import QtPositioning