SwingX: fixed too wide border when using date picker as table cell editor (issue #24)

flatlaf-swingx/src/main/java/com/formdev/flatlaf/swingx/ui/FlatDatePickerBorder.java

@@ -17,6 +17,7 @@
 package com.formdev.flatlaf.swingx.ui;
 
 import java.awt.Component;
+import javax.swing.JTable;
 import org.jdesktop.swingx.JXDatePicker;
 import com.formdev.flatlaf.ui.FlatRoundBorder;
 
@@ -35,4 +36,9 @@ public class FlatDatePickerBorder
 
 		return super.isFocused( c );
 	}
+
+	@Override
+	protected boolean isTableCellEditor( Component c ) {
+		return c.getParent() instanceof JTable;
+	}
 }