Filter out Less files from resource copying

pmd-ui/pom.xml

@@ -18,6 +18,16 @@
     </properties>
 
     <build>
+
+        <resources>
+            <resource>
+                <directory>${project.basedir}/src/main/resources/</directory>
+                <excludes>
+                    <exclude>**/*.less</exclude>
+                </excludes>
+            </resource>
+        </resources>
+
         <plugins>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>

pmd-ui/src/main/java/net/sourceforge/pmd/util/fxdesigner/MainDesignerController.java

@@ -23,6 +23,7 @@ import org.reactfx.value.Val;
 import net.sourceforge.pmd.lang.LanguageVersion;
 import net.sourceforge.pmd.lang.ast.Node;
 import net.sourceforge.pmd.lang.symboltable.NameDeclaration;
+import net.sourceforge.pmd.lang.symboltable.NameOccurrence;
 import net.sourceforge.pmd.util.fxdesigner.model.XPathEvaluationException;
 import net.sourceforge.pmd.util.fxdesigner.util.DesignerUtil;
 import net.sourceforge.pmd.util.fxdesigner.util.LimitedSizeStack;
@@ -272,8 +273,11 @@ public class MainDesignerController implements Initializable, SettingsOwner {
     public void onNameDeclarationSelected(NameDeclaration declaration) {
         sourceEditorController.clearNameOccurences();
 
-        Optional.ofNullable(declaration.getNode().getScope().getDeclarations().get(declaration))
-                .ifPresent(sourceEditorController::highlightNameOccurrences);
+        List<NameOccurrence> occurrences = declaration.getNode().getScope().getDeclarations().get(declaration);
+
+        if (occurrences != null) {
+            sourceEditorController.highlightNameOccurrences(occurrences);
+        }
 
         Platform.runLater(() -> onNodeItemSelected(declaration.getNode()));
     }