[IMP] display of spacing in listings

In entries explanations and configuration, make it possible to "split"
the list in multiple sub-lists visually: a ``null`` item should just
create an empty space, not display a list item "dot"

_static/accounting.css

@@ -98,6 +98,10 @@
     }
 }
 
+.journal-entries .entries-listing p {
+    font-style: italic;
+}
+
 #reconciliation #example div.buttons {
     display: flex;
     justify-content: center;