Editor Fixes:

- Updated Undo to use setBinValue().  This will allow for redraw when selecting undo or undo all.
 - Added check for no compares or empty list before refreshing table compares.

src/main/java/com/romraider/maps/DataCell.java

@@ -555,17 +555,15 @@ public class DataCell extends JLabel implements MouseListener, Serializable {
     }
 
     public void undo() {
-        if(binValue != originalValue) {
+        this.setBinValue(originalValue);
-            binValue = originalValue;
-            drawCell();
-        }
     }
 
     public void setRevertPoint() {
-        if(originalValue != binValue) {
+        this.setOriginalValue(binValue);
-            originalValue = binValue;
-            drawCell();
     }
+
+    public void setOriginalValue(double originalValue) {
+        this.originalValue = originalValue;
     }
 
     public void setCompareValue(DataCell compareCell) {

src/main/java/com/romraider/maps/Table.java

@@ -1217,6 +1217,10 @@ public abstract class Table extends JPanel implements Serializable {
     }
 
     public void refreshCompares() {
+        if(null == getComparedToTables() || getComparedToTables().size() < 1) {
+            return;
+        }
+        
         Window ancestorWindow = SwingUtilities.getWindowAncestor(this);
 
         if(null != ancestorWindow) {