Fix#35998
1. Fix `<a rel>` :
* "_blank" already means "noopener"
* "noreferrer" is already provided by page's `<meta name="referrer">`
2. Fix "redirect_to" mechisam
* Use "referer" header to determine the redirect link for a successful
login
3. Simplify code and merge duplicate logic
Some translations are duplicated for the same package fields; it should
be possible to use the same approach. Checked packages to use the same
forms in templates.
1. Removed repeated translations for the same fields
2. Linked template files to the same translation fields
3. Added repository site link for nuget packages