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>

templates/portfolios/fragments/portfolio_members.html

@@ -72,7 +72,7 @@
         member_form.SubmitStep(
           name=new_manager_modal,
           form=member_form_fields.PermsFields(new_manager_form),
-          submit_text="Invite member",
+          submit_text="Add Mananger",
           modal=new_manager_modal_name,
         )
       ],