cyberstammtisch-silverstripe/themes/silverstrap/templates/SilverStripe/Forms/FormField.ss

<input class="$Silverstrap.control $extraClass" $getAttributesHTML('class')<% if $isReadonly %> readonly<% else_if $isDisabled %> disabled<% end_if %><% if $Description && not $isDisabled %> data-toggle="tooltip" title="$Description.ATT"<% end_if %>>