[FIX] error: Move the unified search form into a separate include file as tiki-searchindex.tpl now extends layout_view.tpl so the modules were getting repeated inside the page (see wish4802)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48283 b456876b-0849-0410-b77d-98878d47e9d5