Properly dismiss the new project sheet after the user clicks 'Next'.

PiperOrigin-RevId: 226172882
diff --git a/src/Tulsi/ProjectEditorPackageManagerViewController.swift b/src/Tulsi/ProjectEditorPackageManagerViewController.swift
index b0d7eda..cbc209b 100644
--- a/src/Tulsi/ProjectEditorPackageManagerViewController.swift
+++ b/src/Tulsi/ProjectEditorPackageManagerViewController.swift
@@ -183,7 +183,7 @@
   func viewController(_ vc: NewProjectViewController,
                       didCompleteWithReason reason: NewProjectViewController.CompletionReason) {
     defer {newProjectSheet = nil}
-    dismiss(newProjectSheet)
+    dismiss(vc)
 
     guard reason == .create else {
       // Nothing useful can be done if the user doesn't wish to create a new project, so close this