pdf previews: set tooltip showing documents path

gui/mainwindow.cpp

@@ -116,6 +116,7 @@ void MainWindow::pdfPreviewReceived(PdfPreview preview)
 {
     ClickLabel *label = new ClickLabel();
     label->setPixmap(QPixmap::fromImage(preview.previewImage));
+    label->setToolTip(preview.documentPath);
     ui->scrollAreaWidgetContents->layout()->addWidget(label);
     connect(label, &ClickLabel::clicked, [=]() {
         QSettings settings;