Raise main window when starting another instance w/o params

src/main.cpp

@@ -197,6 +197,8 @@ int main(int argc, char *argv[]) {
       qDebug("Passing program parameters to running instance...");
       qDebug("Message: %s", qPrintable(message));
       app.sendMessage(message);
+    } else { // Raise main window
+      app.sendMessage("qbt://show");
     }
     return 0;
   }

src/mainwindow.cpp

@@ -960,6 +960,14 @@ void MainWindow::processParams(const QStringList& params) {
     if (misc::isUrl(param)) {
       QBtSession::instance()->downloadFromUrl(param);
     }else{
+      if(param.startsWith("qbt://show", Qt::CaseInsensitive)) {
+        if(!ui_locked) {
+          show();
+          activateWindow();
+          raise();
+        }
+        return; // Do not process more params
+      }
       if (param.startsWith("bc://bt/", Qt::CaseInsensitive)) {
         qDebug("Converting bc link to magnet link");
         param = misc::bcLinkToMagnet(param);