An input element of type search is functionally equivalent to one of type text.
Example
<_form action="get" mwreturn="{{fullurl:Questions-and-answers}}" >
<_label for="search-this-site">Search me</_label>
<div class="input-group">
<_input type="search" id="search-this-site" name="filters" value="Tag^^Installation" class="form-control" />
<div class="input-group-append"><_input type="submit" value="Go" class="btn btn-secondary" /></div>
</div>
</_form>
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