Fix being able to rename classes when disabled (#299)

* Update ClassSelectorPopupMenu.java

* Checkstyle

Author: PiTheGuy

enigma-swing/src/main/java/org/quiltmc/enigma/gui/element/ClassSelectorPopupMenu.java

@@ -2,6 +2,7 @@
 
 import org.quiltmc.enigma.api.source.TokenType;
 import org.quiltmc.enigma.gui.ClassSelector;
+import org.quiltmc.enigma.gui.EditableType;
 import org.quiltmc.enigma.gui.Gui;
 import org.quiltmc.enigma.gui.docker.ClassesDocker;
 import org.quiltmc.enigma.gui.util.PackageRenamer;
@@ -32,10 +33,12 @@ public ClassSelectorPopupMenu(Gui gui, ClassesDocker docker) {
 		this.gui = gui;
 		this.selector = docker.getClassSelector();
 		this.ui = new JPopupMenu();
+		if (gui.isEditable(EditableType.CLASS)) {
+			this.ui.add(this.renamePackage);
+			this.ui.add(this.movePackage);
+			this.ui.add(this.renameClass);
+		}
 
-		this.ui.add(this.renamePackage);
-		this.ui.add(this.movePackage);
-		this.ui.add(this.renameClass);
 		this.ui.add(this.regenerateStats);
 		this.ui.add(this.toggleMapping);
 		this.ui.addSeparator();