vcs: fix commit dialog disposal

* call `close()` directly, without `getOKAction().isEnabled()` check
* this was broken in 2f19315, because `getOKAction()` no longer returns
  new Action instance on each invocation (that is always enabled)

platform/vcs-impl/src/com/intellij/openapi/vcs/changes/ui/CommitChangeListDialog.java

@@ -645,7 +645,7 @@ public class CommitChangeListDialog extends DialogWrapper implements CheckinProj
           CheckinHandler.ReturnResult result = runBeforeCommitHandlers(new Runnable() {
             @Override
             public void run() {
-              CommitChangeListDialog.super.doOKAction();
+              close(OK_EXIT_CODE);
               doCommit(myResultHandler);
             }
           }, null);