Add a "Show QR code" to the account menu

Making this a couple of clicks away under the account menu should make
it easier to show the QR code without digging through the settings.

src/qml/AccountMenu.qml

@@ -19,6 +19,22 @@ QQC2.Menu {
 
     margins: Kirigami.Units.smallSpacing
 
+    QQC2.MenuItem {
+        text: i18nc("@action:button", "Show QR code")
+        icon.name: "view-barcode-qr-symbolic"
+        onTriggered: {
+            let qrMax = Qt.createComponent('org.kde.neochat', 'QrCodeMaximizeComponent').createObject(QQC2.Overlay.overlay, {
+                text: "https://matrix.to/#/" + root.connection.localUser.id,
+                title: root.connection.localUser.displayName,
+                subtitle: root.connection.localUser.id,
+                avatarSource: root.connection.makeMediaUrl(root.connection.localUser.avatarUrl)
+            });
+            if (typeof root.closeDialog === "function") {
+                root.closeDialog();
+            }
+            qrMax.open();
+        }
+    }
     QQC2.MenuItem {
         text: i18n("Edit this account")
         icon.name: "document-edit"