Fixed secondary sorting not working for some special fields (#7409)

CHANGELOG.md

@@ -42,6 +42,7 @@ Note that this project **does not** adhere to [Semantic Versioning](http://semve
 - We fixed an issue where the password for a shared SQL database was only remembered if it was the same as the username [#6869](https://github.com/JabRef/jabref/issues/6869)
 - We fixed an issue where alt+keyboard shortcuts do not work [#6994](https://github.com/JabRef/jabref/issues/6994)
 - We fixed an issue where the file path is invisible in dark theme. [#7382](https://github.com/JabRef/jabref/issues/7382)
+- We fixed an issue where the secondary sorting is not working for some special fields. [#7015](https://github.com/JabRef/jabref/issues/7015)
 - We fixed an issue where changing the font size makes the font size field too small. [#7085](https://github.com/JabRef/jabref/issues/7085)
 
 ### Removed

src/main/java/org/jabref/gui/maintable/columns/SpecialFieldColumn.java

@@ -19,9 +19,8 @@
 import org.jabref.gui.specialfields.SpecialFieldViewModel;
 import org.jabref.gui.specialfields.SpecialFieldsPreferences;
 import org.jabref.gui.util.OptionalValueTableCellFactory;
-import org.jabref.gui.util.comparator.PriorityFieldComparator;
 import org.jabref.gui.util.comparator.RankingFieldComparator;
-import org.jabref.gui.util.comparator.ReadStatusFieldComparator;
+import org.jabref.gui.util.comparator.SpecialFieldComparator;
 import org.jabref.model.entry.BibEntry;
 import org.jabref.model.entry.field.FieldFactory;
 import org.jabref.model.entry.field.SpecialField;
@@ -83,15 +82,8 @@ public SpecialFieldColumn(MainTableColumnModel model, PreferencesService prefere
 
         if (specialField == SpecialField.RANKING) {
             this.setComparator(new RankingFieldComparator());
-        }
-
-        // Added comparator for Read Status
-        if (specialField == SpecialField.READ_STATUS) {
-            this.setComparator(new ReadStatusFieldComparator());
-        }
-
-        if (specialField == SpecialField.PRIORITY) {
-            this.setComparator(new PriorityFieldComparator());
+        } else {
+            this.setComparator(new SpecialFieldComparator());
         }
 
         this.setSortable(true);

src/main/java/org/jabref/gui/util/comparator/PriorityFieldComparator.java → src/main/java/org/jabref/gui/util/comparator/SpecialFieldComparator.java

@@ -5,7 +5,7 @@
 
 import org.jabref.gui.specialfields.SpecialFieldValueViewModel;
 
-public class PriorityFieldComparator implements Comparator<Optional<SpecialFieldValueViewModel>> {
+public class SpecialFieldComparator implements Comparator<Optional<SpecialFieldValueViewModel>> {
 
     @Override
     public int compare(Optional<SpecialFieldValueViewModel> val1, Optional<SpecialFieldValueViewModel> val2) {