add more icon types (still pointing to the same file), more needed

src/main/java/org/jastadd/tooling/util/JastAddIcons.java

@@ -7,6 +7,11 @@ import javax.swing.*;
 public class JastAddIcons {
 
   public static final Icon FILE = IconLoader.getIcon("/META-INF/pluginIcon.svg", JastAddIcons.class);
+  public static final Icon ASPECT = IconLoader.getIcon("/META-INF/pluginIcon.svg", JastAddIcons.class);
+  public static final Icon ATTRIBUTE = IconLoader.getIcon("/META-INF/pluginIcon.svg", JastAddIcons.class);
+  public static final Icon COL_ATTRIBUTE = IconLoader.getIcon("/META-INF/pluginIcon.svg", JastAddIcons.class);
+  public static final Icon INH_ATTRIBUTE = IconLoader.getIcon("/META-INF/pluginIcon.svg", JastAddIcons.class);
+  public static final Icon SYN_ATTRIBUTE = IconLoader.getIcon("/META-INF/pluginIcon.svg", JastAddIcons.class);
 
   private JastAddIcons() {
     throw new IllegalStateException("Utility class");