Fix styling on member forms.

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

styles/components/_member_form.scss

@@ -1,6 +1,5 @@
 .member-form {
   text-align: left;
-  min-width: 75rem;
 
   input[type="checkbox"] + label::before {
     margin-left: 0;
@@ -53,3 +52,10 @@
     }
   }
 }
+
+#modal--add-app-mem,
+#modal--add-portfolio-manager {
+  .modal__body {
+    min-width: 75rem;
+  }
+}