Duplicate pageID for pages created from a template with shortened URL

[oanalavinia]

Steps to reproduce:

1. Go to a page template , e.g. Templates.Article.Template
2. Create a shortened URL for it (i.e. Page menu -> click on Get shortened URL)
3. Create a page using the Article template , e.g. MyArticle
4. Create a shortened URL for MyArticle and access it

Expected result:
The created URL is unique and redirects to MyArticle

Actual result:
The created URL is the same as the one for Templates.Article.Template and might redirect to either of them.
Every page created with this template will have the same shortened URL

[oanalavinia]

Solution:
Pages created from template will not copy anymore the shortened URL object from the template (this was the actual issue).
This way, you can also have a shortened URL for your template without influencing created pages.