Fix styling on member forms.

Include flash message when portfolio manager is added.
Fix submit button text

templates/portfolios/admin.html

@@ -10,7 +10,7 @@
 {{ StickyCTA(text="Settings") }}
 
   <div v-cloak class="portfolio-admin">
-
+    {% include "fragments/flash.html" %}
     <!-- max width of this section is 460px -->
     <section class="form-container__half">
       <h3>Portfolio name and component</h3>