Revert partially: "Show talk button only when JS enabled or talk page not empty"

This reverts the part of I4311e23c6796548c91ace799ce66fb6d38242e17 to hide the talk
button in stable mode. In alpha the talk button is still hidden when no JS or 0 discussions on it.

Bug: 71570
Change-Id: I15ddbe7c85a30605572d906d66b955f2ef390718
Merge "Revert partially: "Show talk button only when JS enabled or talk page not empty""