LMS: adds in redundant, but needed dashboard visual padding rule

lms/static/sass/_shame.scss

@@ -230,3 +230,10 @@
 footer .references {
   @include footer_references_style;
 }
+
+// ====================
+
+// poor cascade made worse by CSS splitting requires us to redefine the dashboard views' visual top padding
+.dashboard {
+  padding-top: 60px;
+}