Add confirm loop

For pages where
- we want you to be sure that you want to do what you’re about to do
- we want to be sure it’s you trying to do the thing

This adds a page that asks the user to confirm their password.

app/assets/stylesheets/components/browse-list.scss

@@ -20,7 +20,7 @@
   }
 
   &-hint {
-    @include core-16;
+    @include core-19;
     margin-top: 5px;
   }
 

app/assets/stylesheets/components/submit-form.scss

@@ -12,7 +12,8 @@
   .button {}
 
   .button-destructive {
-    @include button($error-colour)
+    @include button($error-colour);
+    padding: 0.52632em 0.78947em 0.26316em 0.78947em;
   }
 
 }