Fix incorrect arguments parsing on app restart.

Should fix #913

src/doc/kdenlivedoc.cpp

@@ -134,7 +134,7 @@ KdenliveDoc::KdenliveDoc(const QUrl &url, QString projectFolder, QUndoGroup *und
         QFile file(url.toLocalFile());
         if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
             // The file cannot be opened
-            if (KMessageBox::warningContinueCancel(parent, i18n("Cannot open the project file,\nDo you want to open a backup file?"),
+            if (KMessageBox::warningContinueCancel(parent, i18n("Cannot open the project file %1,\nDo you want to open a backup file?", file.fileName()),
                                                    i18n("Error opening file"), KGuiItem(i18n("Open Backup"))) == KMessageBox::Continue) {
                 *openBackup = true;
             }

src/main.cpp

@@ -293,13 +293,13 @@ int main(int argc, char *argv[])
                 }
             }
         }
-#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
-        QStringList progArgs = QString(*argv).split(QLatin1Char(' '), QString::SkipEmptyParts);
-#else
-        QStringList progArgs = QString(*argv).split(QLatin1Char(' '), Qt::SkipEmptyParts);
-#endif
-        // Remove app name
-        progArgs.takeFirst();
+        QStringList progArgs;
+        if (argc > 1) {
+            // Start at 1 to remove app name
+            for (int i = 1; i < argc; i++) {
+                progArgs << QString(argv[i]);
+            }
+        }
         auto *restart = new QProcess;
         restart->start(app.applicationFilePath(), progArgs);
         restart->waitForReadyRead();