Show list of group members in the group page.

Users want to see other users in the groups they belong to
and annotations each of these users have made and shared with a
group. This will help them decide how to share annotations with
their groups.

https://trello.com/c/rSUQLuos/294-as-a-user-i-want-to-be-able-to-find-out-who-is-a-member-of-a-group-i-m-in

h/static/styles/group-form.scss

@@ -85,18 +85,16 @@
     }
   }
 
-  .group-document-list {
-
+  .group-document-list, .group-members-list {
+    display: flex;
     justify-content: left;
     font-size: $body2-font-size;
     line-height: $body2-line-height;
     background-color: $white;
     color: $color-dove-gray;
-
-    border: $border;
-    border-top: none;
+    border-left: $border;
+    border-right: $border;
     padding-top: 20px;
-    padding-bottom: 10px;
     padding-left: 20px;
     padding-right: 20px;
 
@@ -111,6 +109,10 @@
 
   }
 
+  .group-members-list {
+    border-bottom: $border;
+  }
+
   .group-form-footer {
     @include flex-center-column();