{% comment %} Search and filters for the speaker directory, rendered by HTMxTableView via htmx_table_header_template. Stacked rather than laid out in a row: the search box gets a full-width line of its own, and everything else is a dropdown under it. That is the same at every width -- a dropdown is a fixed-size button no matter how many options are behind it, so nothing here has to be rearranged for a phone. The form filters as you type, so there is no apply button. {% endcomment %}