This was set by JS in collapsibleNav (wtf?) until I220057c7 nuked that module entirely.
A user needed this for accessibility reasons (details in OTRS#
2014051610008141)
Bug: 29199
Change-Id: I74725c01a2058be1151927661c22ce42a1463f91
'name' => 'search',
'placeholder' => wfMessage( 'searchsuggest-search' )->text(),
'value' => $this->get( 'search', '' ),
+ 'tabindex' => 1
);
$realAttrs = array_merge( $realAttrs, Linker::tooltipAndAccesskeyAttribs( 'search' ), $attrs );
return Html::element( 'input', $realAttrs );