Added some css classes to the contextual menu, and a temporary css hack.

css/opencase.css

@@ -1,3 +1,10 @@
+/* MOVE THIS INTO MORE!! */
+.top_ups_bought.add-activity-link {
+  display: none;
+}
+
+/*  */
+
 body {
   font-size: 100% !important;
 }

modules/opencase_no_cases/src/Plugin/Block/ContextualMenu.php

@@ -57,7 +57,7 @@ class ContextualMenu extends BlockBase {
       $url = \Drupal\Core\Url::fromRoute("entity.oc_activity.add_form", ['oc_activity_type' => $machine_name]);
       $url->setOption('query', ['actor_id' => $actor_id, 'destination' => $redirect_destination]);
       $link = \Drupal\Core\Link::fromTextAndUrl($label, $url)->toString();
-      $markup .= "   $link";  
+      $markup .= "&nbsp;&nbsp; <span class='$machine_name add-activity-link'>$link</span>";  
     }
     $markup .= "</p>";
     return "<div class='openactor_add_links'>$markup</div>";