Fix translation typos and missing Q_OBJECT macro

src/backgroundmanager/backgroundresultwidget.cpp

@@ -51,7 +51,7 @@ BackgroundResultWidget::BackgroundResultWidget(IBackgroundChecker *mgr_, QWidget
     view->setContextMenuPolicy(Qt::CustomContextMenu);
     connect(view, &QTreeView::customContextMenuRequested, this, &BackgroundResultWidget::showContextMenu);
 
-    setWindowTitle(tr("Rollingstock Errors"));
+    setWindowTitle(tr("Error Results"));
 
     progressBar->hide();
 }

src/jobs/jobs_checker/crossing/jobcrossingchecker.h

@@ -9,6 +9,7 @@
 
 class JobCrossingChecker : public IBackgroundChecker
 {
+    Q_OBJECT
 public:
     JobCrossingChecker(sqlite3pp::database &db, QObject *parent = nullptr);
 

src/jobs/jobs_checker/crossing/jobcrossingmodel.cpp

@@ -8,7 +8,7 @@ static const char* error_texts[] = {
     QT_TRANSLATE_NOOP("JobErrors", "Job passes another Job on same track.")
 };
 
-class JobError
+class JobErrors
 {
     Q_DECLARE_TR_FUNCTIONS(JobErrors)
 };
@@ -61,7 +61,7 @@ QVariant JobCrossingModel::data(const QModelIndex &idx, int role) const
         case Departure:
             return item->departure;
         case Description:
-            return JobError::tr(error_texts[item->type]);
+            return JobErrors::tr(error_texts[item->type]);
         default:
             break;
         }

src/stations/manager/stations/dialogs/stationeditdialog.cpp

@@ -737,7 +737,7 @@ void StationEditDialog::importConnFromSVG()
     }
     else
     {
-        QMessageBox::warning(this, tr("Import Errpr"),
+        QMessageBox::warning(this, tr("Import Error"),
                              tr("Generic error"));
 
     }