fix: fix sort in display results

app/templates/display_results.html

@@ -78,14 +78,14 @@
 									<div>
 									<button href="#" data-dropdown="drop_sort" aria-controls="drop_sort" aria-expanded="false" class="button round dropdown small secondary unmarged">
 										<span class="material-icons">swap_vert</span>
-										{% if not sort_by %}Relevance{% elif sort_by == "unique_scans_n" %}Most scanned products{% elif sort_by == "nutriscore_score" %}Products with the best Nutri-Score{% elif sort_by == "-ecoscore_score" %}Products with the best Eco-Score{% elif sort_by == "created_t" %}Recently added products{% elif sort_by == "last_modified_t" %}Recently modified products{% endif %}
+										{% if not sort_by %}Relevance{% elif sort_by == "-unique_scans_n" %}Most scanned products{% elif sort_by == "nutriscore_score" %}Products with the best Nutri-Score{% elif sort_by == "-ecoscore_score" %}Products with the best Eco-Score{% elif sort_by == "created_t" %}Recently added products{% elif sort_by == "last_modified_t" %}Recently modified products{% endif %}
 									</button>
 									<ul id="drop_sort" data-dropdown-content="" class="f-dropdown" aria-hidden="true" style="position: absolute; left: -99999px; top: 38px;">
 										<li>
 											<a href="/?q={{ q|urlencode }}&amp;page_size={{ results.page_size }}">Relevance</a>
 											</li>
 										<li>
-										<a href="/?q={{ q|urlencode }}&amp;sort_by=unique_scans_n&amp;page_size={{ results.page_size }}">Most scanned products</a>
+										<a href="/?q={{ q|urlencode }}&amp;sort_by=-unique_scans_n&amp;page_size={{ results.page_size }}">Most scanned products</a>
 										</li>
 
 										<li>