Fix: Workbench drop down menu is cut off on the right. (#1066)

* Fix: Workbench drop down is cut off on the right.

* Revert custom CSS
Update Dropdown menu class

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Co-authored-by: Chandra Y <[email protected]>

Author: jmartinez-tacc

server/portal/templates/includes/nav_portal.raw.html

@@ -25,7 +25,7 @@
     <span>{{ user.get_username }}</span>
     <span class="sr-only">Toggle Dropdown</span>
   </a>
-  <nav class="dropdown-menu dropdown-menu-right">
+  <nav class="dropdown-menu dropdown-menu-end">
     <a class="dropdown-item" href="{% url 'workbench:dashboard' %}">
       <i class="icon icon-dashboard"></i> My Dashboard
     </a>