Subsilver2: display online/offline icon below avatar on viewtopic

This should make it look less cluttered on subsilver2/wesnoth; prosilver
uses a background decoration and AcidTech uses an unobstrusive icon.
Search Users Post in ACP (sic): apply mod version 1.0.0

[http://www.phpbb.com/customise/db/mod/sup/]
Prime Signature Cap: install mod version 1.0.1

[http://www.phpbb.com/customise/db/mod/prime_signature_cap]

This allows admins to set and enforce a signature line limit.
Prosilver Special Edition: 1.0.10, without templates

[http://www.phpbb.com/customise/db/style/prosilver_special_edition/]
Prosilver Special Edition: Revert some SE changes to match mainline prosilver