[FIX] find: From and to date year selectors were hard-coded to -2 to +2, so make those into prefs and use these in tracker fields.
Also stop "Clear Filters" button from sending back maxRecords empty which caused an error, and make the clear button appear more often.


git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48061 b456876b-0849-0410-b77d-98878d47e9d5