settings: allow multiple audio file types

Change-Id: I2d73bdee9d8f98d2b4534008091facfa1637ce3d

advancedsettingswidget.cpp

@@ -155,7 +155,7 @@ AdvancedSettingsWidget::openFileCustomRingtone()
     QString fileUrl;
     auto oldPath = QString::fromStdString(LRCInstance::getCurrAccConfig().Ringtone.ringtonePath);
     auto openPath = oldPath.isEmpty() ? QDir::currentPath() + QString("/ringtones/") : QFileInfo(oldPath).absolutePath();
-    fileUrl = QFileDialog::getOpenFileName(this, QString("Select a new ringtone"), openPath, tr("Opus Files (*.opus)"));
+    fileUrl = QFileDialog::getOpenFileName(this, QString("Select a new ringtone"), openPath, tr("Audio Files (*.wav, *.ogg, *.opus, *.mp3)"));
     if (!fileUrl.isEmpty()) {
         auto confProps = LRCInstance::accountModel().getAccountConfig(LRCInstance::getCurrAccId());
         confProps.Ringtone.ringtonePath = fileUrl.toStdString();