Resolve "Show status icon for every lesson"

Closes #63 (closed)

Blocked by !48 (merged)

aleksis/apps/alsijil/static/css/alsijil/alsijil.css

+table.datatable a {
+  color: inherit !important;
+}
+
+table a.tr-link {
+  display: block;
+  width: inherit;
+  height: inherit;
+}