adding spacing around streamfield blocks

opentech/static_src/src/sass/components/_responsive-object.scss

 .responsive-object {
     position: relative;
+    margin-bottom: 2rem;
+
+    @include media-query(tablet-portrait) {
+        margin-bottom: 4rem;
+    }
 
     iframe,
     object,

opentech/static_src/src/sass/components/_wrapper.scss

@@ -75,8 +75,11 @@
         }
     }
 
+    &--streamfield {
+        margin-bottom: 2rem;
+
         @include media-query(tablet-portrait) {
-            flex-direction: row;
+            margin-bottom: 4rem;
         }
     }
 }

opentech/templates/blocks/image_block.html

 {% load wagtailimages_tags %}
-
-{% image value.image original %}
-<p>{{ value.caption }}</p>
+<div class="wrapper wrapper--streamfield">
+    {% image value.image original %}
+    <p>{{ value.caption }}</p>
+</div>