Fix activating browser windows on Wayland

QDesktopServices::openUrl does not have XDG activation support yet so it can't raise an existing browser window when opening URLs

Instead use KIO::OpenUrlJob, which does support that

src/urlhelper.cpp

@@ -0,0 +1,24 @@
+// SPDX-FileCopyrightText: 2022 Nicolas Fella <nicolas.fella@gmx.de>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "urlhelper.h"
+
+#include <QtGlobal>
+
+#ifdef Q_OS_ANDROID
+#include <QDesktopServices>
+#else
+#include <KIO/OpenUrlJob>
+#endif
+
+// QDesktopServices::openUrl doesn't support XDG activation yet, OpenUrlJob does
+// On Android XDG activation is not relevant, so use QDesktopServices::openUrl to avoid the heavy KIO dependency
+void UrlHelper::openUrl(const QUrl &url)
+{
+#ifdef Q_OS_ANDROID
+    QDesktopServices::openUrl(url);
+#else
+    auto *job = new KIO::OpenUrlJob(url);
+    job->start();
+#endif
+}