xmodule - Capa/HTML: adds top/bottom margin to table elements

common/lib/xmodule/xmodule/css/capa/display.scss

@@ -436,7 +436,7 @@ section.problem {
   }
 
   table {
-    margin-bottom: lh();
+    margin: lh() 0;
     border-collapse: collapse;
     table-layout: auto;
 

common/lib/xmodule/xmodule/css/html/display.scss

@@ -117,6 +117,7 @@ code {
 
 table {
   width: 100%;
+  margin: 20px 0;
   border-collapse: collapse;
   font-size: 16px;