Merge pull request #25143 from edx/jhynes/microba-605_button-style

MICROBA-605 | Adjust demographics modal button style

themes/edx.org/lms/static/sass/partials/lms/theme/_dashboard.scss

@@ -79,6 +79,7 @@
       text-shadow: none;
       letter-spacing: normal;
       margin: 5px 0 5px 0;
+      box-shadow: none;
 
       &.blue {
         background-color: #23419f;
@@ -229,4 +230,4 @@
       }
     }
   }
-}
\ No newline at end of file
+}