Make sure helper apps we start are in path

plugins/messageviewer/bodypartformatter/gnupgwks/gnupgwksurlhandler.cpp

@@ -54,7 +54,11 @@ bool ApplicationGnuPGWKSUrlHandler::handleClick(MessageViewer::Viewer *viewerIns
 
     const QUrlQuery q(path.mid(sizeof("gnupgwks?") - 1));
     if (q.queryItemValue(QStringLiteral("action")) == QLatin1String("show")) {
-        QProcess::startDetached(QStringLiteral("kleopatra"), {QStringLiteral("--query"), q.queryItemValue(QStringLiteral("fpr"))});
+        const QString progFullPath = QStandardPaths::findExecutable(QStringLiteral("kleopatra"));
+        if (progFullPath.isEmpty()
+            || !QProcess::startDetached(QStringLiteral("kleopatra"), {QStringLiteral("--query"), q.queryItemValue(QStringLiteral("fpr"))})) {
+            return false;
+        }
         return true;
     } else if (q.queryItemValue(QStringLiteral("action")) == QLatin1String("confirm")) {
         GnuPGWKSMessagePart mp(part);

plugins/messageviewer/bodypartformatter/itinerary/itineraryurlhandler.cpp

@@ -235,7 +235,9 @@ void ItineraryUrlHandler::addToCalendar(ItineraryMemento *memento) const
 void ItineraryUrlHandler::openInApp(MimeTreeParser::Interface::BodyPart *part) const
 {
     const auto fileName = createItineraryFile(part);
-    QProcess::startDetached(m_appPath, {fileName});
+    if (m_appPath.isEmpty() || !QProcess::startDetached(m_appPath, {fileName})) {
+        qCWarning(ITINERARY_LOG) << "Could not find application in PATH." << m_appPath;
+    }
 }
 
 void ItineraryUrlHandler::openWithKDEConnect(MimeTreeParser::Interface::BodyPart *part, const QString &deviceId) const