IDEA-80382 Notifications: when balloon is shown in Event Log and after clicking a link it expires, it should be hidden

platform/platform-api/src/com/intellij/notification/Notification.java

@@ -97,6 +97,11 @@ public class Notification {
 
   public void expire() {
     NotificationsManager.getNotificationsManager().expire(this);
+    hideBalloon();
+    myExpired = true;
+  }
+
+  public void hideBalloon() {
     if (myBalloonRef != null) {
       final Balloon balloon = myBalloonRef.get();
       if (balloon != null) {
@@ -104,7 +109,6 @@ public class Notification {
       }
       myBalloonRef = null;
     }
-    myExpired = true;
   }
 
   public void setBalloon(@Nullable final Balloon balloon) {

platform/platform-impl/src/com/intellij/notification/EventLog.java

@@ -415,6 +415,8 @@ public class EventLog implements Notifications {
         Balloon balloon = NotificationsManagerImpl.createBalloon(myNotification, true, true);
         Disposer.register(project, balloon);
         balloon.show(target, Balloon.Position.above);
+        myNotification.hideBalloon();
+        myNotification.setBalloon(balloon);
       }
     }