Fix markdown rendering in the message viewer

Fixes #284

client/components/main/layouts.styl

@@ -316,10 +316,17 @@ a
   margin-left: 38px
 
 .viewer
+  ol
+    list-style-type: decimal
+    padding-left: 20px
+
   ul
     list-style-type: initial
     padding-left: 20px
 
+  em
+    font-style : italic
+
   pre
     padding: 10px 12px 7px
     background: darken(white, 13%)