fix image height in gallery

layouts/gallery/single.html

@@ -6,11 +6,11 @@
     {{ $.Scratch.Set "counter" (add ($.Scratch.Get "counter") 1) }}
 {{ end }}
 {{ $c := $.Scratch.Get "counter" }}
-<div style="height:100%; width: 100%; text-align: center; white-space: nowrap;">
+<div style="height: auto; width: 100%; text-align: center; white-space: nowrap;">
   {{ range $img := .Params.image }}<img src="{{ $img }}"
        class="figure-img ratio img-responsive img-rounded"
 	   style="max-width: calc((100% / {{ $c }}) - 1ex);
-			  max-height: 100%;
+			  max-height: calc(50vh);
 			  display: inline-block; scale=10;
 			  margin-left: .5ex; margin-right: .5ex;"
 	   alt="{{ $.Title }}">{{ end }}