Flex project structure: force configurable reset after apply(), otherwise we would hold references to disposed order entries (AS-324)

java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/projectRoot/ModuleStructureConfigurable.java

@@ -366,6 +366,10 @@ public class ModuleStructureConfigurable extends BaseStructureConfigurable imple
     if (myContext.myModulesConfigurator.isModified()) {
       myContext.myModulesConfigurator.apply();
     }
+
+    for (final ModuleStructureExtension extension : ModuleStructureExtension.EP_NAME.getExtensions()) {
+      extension.afterModelCommit();
+    }
   }
 
   public boolean isModified() {

java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/projectRoot/ModuleStructureExtension.java

@@ -82,4 +82,7 @@ public abstract class ModuleStructureExtension {
   public ActionCallback selectOrderEntry(@NotNull final Module module, @Nullable final OrderEntry entry) {
     return null;
   }
+
+  public void afterModelCommit() {
+  }
 }