Squashed some NPE

src/main/java/games/rednblack/editor/view/stage/tools/PolygonTool.java

@@ -112,6 +112,7 @@ public class PolygonTool extends SelectionTool implements PolygonTransformationL
         Set<Integer> selectedEntities = sandbox.getSelector().getSelectedItems();
         for(int entity: selectedEntities) {
             BasicFollower follower = followersUIMediator.getFollower(entity);
+            if (follower == null) continue;
             follower.update();
             follower.removeSubFollower(PolygonFollower.class);
             PolygonFollower meshFollower = new PolygonFollower(entity);

src/main/java/games/rednblack/editor/view/ui/panel/TagsPanelMediator.java

@@ -112,6 +112,7 @@ public class TagsPanelMediator extends Mediator<TagsPanel> {
             while (iterator.hasNext()) {
                 entity = iterator.next();
                 mainItemComponent = SandboxComponentRetriever.get(entity, MainItemComponent.class);
+                if (mainItemComponent == null) continue;
                 toRetain.clear();
                 for (String tag : mainItemComponent.tags)
                     toRetain.add(tag);