removed border from images, which conflicted with all other images from external django apps #502

wagtail/wagtailadmin/static/wagtailadmin/scss/components/formatters.scss

@@ -230,8 +230,6 @@ a.tag:hover{
 img{
     max-width:100%;
     height:auto;
-    border: 3px solid $color-grey-4;
-
 }
 
 /* make a block-level element inline */

wagtail/wagtailadmin/static/wagtailadmin/scss/components/listing.scss

@@ -353,6 +353,10 @@ ul.listing{
         font-size:1em;
         opacity:0.7;
     }
+
+    &.images img{
+        border: 3px solid transparent;
+    }
 }
 ul.listing{
     border-top:1px dashed $color-input-border;