[FIX] unified: Rename feature_search pref to "Unified Search Index" and add a remarksbox note to explain a bit more about the other things Unified Index does (addresses wish4666 - could still be improved? Thanks marclaporte)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48276 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] trackers: Validate user really exists before storing new value. Prevents fatal error when option->notify is enabled for the field (thanks Torsten for the example, and Nelson for the diagnosis ;)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48278 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] remarksbox: Add some padding to the title icons (and moved all the relevant css together). Looks better in most themes, further fine tuning welcome

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48279 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] articles: Show author if authorName is empty, position avatar next to the by-line and stop squashed layout when topic doesn't have an image

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48280 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] articles: Show author if authorName is empty on read_article too and show full name according to prefs

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48281 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] articles: Add expireDate column to article submissions and use date only format on both lists (with the datetime on a tooltip)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48282 b456876b-0849-0410-b77d-98878d47e9d5
[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
[MRG] Automatic merge, branches/12.x 48274 to 48283

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@48284 b456876b-0849-0410-b77d-98878d47e9d5