Trying to fix a blinking test

Sometimes quick-fix tests that use Change Signature failed with weird assertions, allegedly because an alarm inside the Change Signature dialog schedules something on AWT thread that fires while the next test is running

idea/src/org/jetbrains/jet/plugin/quickfix/ChangeFunctionSignatureFix.java

@@ -18,6 +18,7 @@ package org.jetbrains.jet.plugin.quickfix;
 
 import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.project.Project;
+import com.intellij.openapi.util.Disposer;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.PsiNameIdentifierOwner;
 import com.intellij.psi.util.PsiTreeUtil;
@@ -120,6 +121,7 @@ public abstract class ChangeFunctionSignatureFix extends JetIntentionAction<PsiE
                 JetChangeInfo changeInfo = dialog.evaluateChangeInfo();
                 JetChangeSignatureProcessor processor = new JetChangeSignatureProcessor(element.getProject(), changeInfo, getText());
                 processor.run();
+                Disposer.dispose(dialog.getDisposable());
             }
         });
     }