[fix] gallery view overlaps category bar

Closes: https://github.com/searxng/searxng/issues/4190

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/static/themes/simple/src/less/definitions.less

@@ -280,7 +280,7 @@
 @results-image-row-height-phone: 10rem;
 @search-width: 44rem;
 // heigh of #search, see detail.less
-@search-height: 7.6rem;
+@search-height: 13rem;
 
 /// Device Size
 /// @desktop > @tablet