title: libGDX Mouse over on UI element fires same event from underlying Actor
body: <p>I'm making a simple RTS game. I've created separate Stages for map and UI, and used scene2D Table class for side panel. The problem is, when i hover my side panel, if there is an actor (building) under panel at the moment, it fires its mouseover event.  Click events work properly.</p>
  
  <p>Here is my building class input listeners:</p>
  
  <pre><code>    public class Building extends Actor {
  
      addListener(new InputListener(){
                          public boolean touchDown (InputEvent event, float x, float y, int pointer, int button) {
                          System.out.println("Click");
                             return true;
                          }
                          public  void    enter(InputEvent event, float x, float y, int pointer, Actor fromActor){
                              ((Building)event.getTarget()).hover = true;
                          }
  </code></pre>
  
  <p>Here is my panel class listeners</p>
  
  <pre><code>public class SidePanel extends Table {
          panelBg = new Image(skin,"side-panel");
          addListener(new InputListener(){
              public boolean touchDown (InputEvent event, float x, float y, int pointer, int button) {
                  System.out.println("Click");
                  return true;
              }
              public  void    enter(InputEvent event, float x, float y, int pointer, Actor fromActor){
  System.out.println("Enter");
              }
          });
            addActor(panelBg);
                }
      }
  </code></pre>
  
  <p>Then side panel is added to UI class stage:</p>
  
  <pre><code>public class UI {
      public  UI(){
          stage = new Stage();
          sidePanel = new SidePanel();
          stage.addActor(sidePanel);
          Gdx.input.setInputProcessor(stage);
        }
  </code></pre>
  
  <p>And finally i added UI to main class:</p>
  
  <pre><code>    @Override
      public void create () {
          ui = new UI();
          CP =new InputMultiplexer();
          CP.addProcessor(ui.stage);
          CP.addProcessor(gameStage);
          Gdx.input.setInputProcessor(CP);
      }
  </code></pre>
  
  <p>Not sure where the problem is, because click event works fine;</p>