correctly update name of run configuration on class rename

idea/src/org/jetbrains/kotlin/idea/run/JetRunConfiguration.java

@@ -34,6 +34,7 @@ import com.intellij.openapi.roots.*;
 import com.intellij.openapi.util.DefaultJDOMExternalizer;
 import com.intellij.openapi.util.InvalidDataException;
 import com.intellij.openapi.util.WriteExternalException;
+import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.PsiClass;
 import com.intellij.psi.PsiElement;
@@ -51,6 +52,7 @@ import org.jetbrains.kotlin.asJava.KotlinLightMethod;
 import org.jetbrains.kotlin.idea.MainFunctionDetector;
 import org.jetbrains.kotlin.idea.caches.resolve.ResolvePackage;
 import org.jetbrains.kotlin.idea.stubindex.JetTopLevelFunctionFqnNameIndex;
+import org.jetbrains.kotlin.load.kotlin.PackageClassUtils;
 import org.jetbrains.kotlin.name.FqName;
 import org.jetbrains.kotlin.name.Name;
 import org.jetbrains.kotlin.psi.JetDeclaration;
@@ -252,6 +254,14 @@ public class JetRunConfiguration extends ModuleBasedConfiguration<RunConfigurati
         }
     }
 
+    @Override
+    public String suggestedName() {
+        if (MAIN_CLASS_NAME == null) {
+            return null;
+        }
+        return StringUtil.trimEnd(MAIN_CLASS_NAME, "." + PackageClassUtils.getPackageClassName(new FqName(MAIN_CLASS_NAME)));
+    }
+
     private static class MyJavaCommandLineState extends JavaCommandLineState {
 
         private final JetRunConfiguration myConfiguration;

idea/src/org/jetbrains/kotlin/idea/run/KotlinRunConfigurationProducer.kt

@@ -70,8 +70,8 @@ public class KotlinRunConfigurationProducer : RunConfigurationProducer<JetRunCon
                                           configuration: JetRunConfiguration,
                                           fqName: FqName) {
         configuration.setModule(module)
-        configuration.setName(StringUtil.trimEnd(fqName.asString(), "." + PackageClassUtils.getPackageClassName(fqName)))
         configuration.setRunClass(fqName.asString())
+        configuration.setGeneratedName()
     }
 
     override fun isConfigurationFromContext(configuration: JetRunConfiguration, context: ConfigurationContext): Boolean {