use cover rather than contain on media gallary except on statuses

app/styles/components/media-gallery.scss

@@ -5,6 +5,7 @@
   border-radius: 4px;
   position: relative;
   width: 100%;
+  height: auto;
   background-color: var(--brand-color--faint);
 }
 
@@ -41,7 +42,7 @@
     width: 100%;
 
     img {
-      object-fit: contain;
+      object-fit: cover;
     }
   }
 
@@ -63,6 +64,18 @@
   }
 }
 
+.status__wrapper, .detailed-status__wrapper {
+  .media-gallery__item-thumbnail {
+    &,
+    .still-image {
+
+      img {
+        object-fit: contain;
+      }
+    }
+  }
+}
+
 .media-gallery__preview {
   width: 100%;
   height: 100%;