improve the design of the validation error list

src/main/java/ninja/javafx/smartcsv/fx/util/I18nValidationUtil.java

@@ -57,7 +57,15 @@ public class I18nValidationUtil {
             }
         }
 
-        return message.toString();
+        if (!validationMessages.isEmpty()) {
+            return cutOffLastLineBreak(message.toString());
+        }
+
+        return "";
+    }
+
+    private static String cutOffLastLineBreak(String message) {
+        return message.substring(0, message.length()-1);
     }
 
 }

src/main/resources/ninja/javafx/smartcsv/fx/smartcsv.css

@@ -1,2 +1,15 @@
+.list-view {
+    -fx-background-color: -fx-background;
+    -fx-padding: 1;
+}
 
+.list-cell {
+    -fx-padding: 1.0em 1.0em 1.0em 1.0em;
+}
+.list-cell:odd {
+    -fx-background: -fx-control-inner-background-alt;
+}
 
+.list-cell:even {
+    -fx-background: -fx-control-inner-background;
+}