Cleanup window has a scrollbar now.

CHANGELOG.md

@@ -38,6 +38,7 @@ We refer to [GitHub issues](/~https://github.com/JabRef/jabref/issues) by using `#
 - We removed the ordinals-to-superscript formatter from the recommendations for biblatex save actions [#2596](/~https://github.com/JabRef/jabref/issues/2596)
 - The `Move linked files to default file directory`-Cleanup operation respects the `File directory pattern` setting 
 - We separated the `Move file` and `Rename Pdfs` logic and context menu entries in the `General`-Tab for the Field `file` to improve the semantics
+- A scrollbar was added to the cleanup panel, as a result of issue [#2501](/~https://github.com/JabRef/jabref/issues/2501)
 
 ### Fixed
  - We fixed an issue where authors with multiple surnames were not presented correctly in the main table. [#2534](/~https://github.com/JabRef/jabref/issues/2534)

src/main/java/org/jabref/gui/actions/CleanupAction.java

@@ -132,8 +132,7 @@ public void update() {
 
     private int showDialog(CleanupPresetPanel presetPanel) {
         String dialogTitle = Localization.lang("Cleanup entries");
-
-        Object[] messages = {Localization.lang("What would you like to clean up?"), presetPanel.getPanel()};
+        Object[] messages = {Localization.lang("What would you like to clean up?"), presetPanel.getScrollPane()};
         return JOptionPane.showConfirmDialog(frame, messages, dialogTitle, JOptionPane.OK_CANCEL_OPTION,
                 JOptionPane.QUESTION_MESSAGE);
     }

src/main/java/org/jabref/gui/cleanup/CleanupPresetPanel.java

@@ -9,6 +9,7 @@
 import javax.swing.JCheckBox;
 import javax.swing.JLabel;
 import javax.swing.JPanel;
+import javax.swing.JScrollPane;
 
 import org.jabref.Globals;
 import org.jabref.logic.cleanup.CleanupPreset;
@@ -35,6 +36,7 @@ public class CleanupPresetPanel {
     private FieldFormatterCleanupsPanel cleanUpFormatters;
 
     private JPanel panel;
+    private JScrollPane scrollPane;
     private CleanupPreset cleanupPreset;
 
     public CleanupPresetPanel(BibDatabaseContext databaseContext, CleanupPreset cleanupPreset) {
@@ -92,6 +94,10 @@ private void init() {
         builder.add(cleanUpISSN).xyw(1, 9, 2);
         builder.add(cleanUpFormatters).xyw(1, 10, 2);
         panel = builder.build();
+        scrollPane = new JScrollPane(panel);
+        scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
+        scrollPane.setVisible(true);
+        scrollPane.setBorder(null);
     }
 
     private void updateDisplay(CleanupPreset preset) {
@@ -109,8 +115,8 @@ private void updateDisplay(CleanupPreset preset) {
         cleanUpFormatters.setValues(preset.getFormatterCleanups());
     }
 
-    public JPanel getPanel() {
-        return panel;
+    public JScrollPane getScrollPane() {
+        return scrollPane;
     }
 
     public CleanupPreset getCleanupPreset() {