New post should show category/subcategory breadcrumb when created.

When the new post is created under the subcategory and it appear
after the creation, it doesn't have the link of category/subcategory
after thread body. When we reload the page the link appears. Link
should appear after creation.

TNL-404
Merge pull request #5279 from mlkwaqas/waqas/tnl404-new-post-hidden-breadcrumb

New post should show category/subcategory breadcrumb when created.
Making the django main template navigation course aware.