Block image: set maximum height to image

assets/sass/_theme/blocks/image.sass

@@ -11,7 +11,11 @@
         .credit
             p
                 @extend .small
-
+    @include in-page-with-aside
+        @include media-breakpoint-up(md)
+            img
+                max-height: calc(100vh - var(--header-height))
+                width: auto
     @include in-page-without-aside
         @include media-breakpoint-up(md)
             figcaption