Allow editing the budget in budget creation wizard

When users created a budget and made a typo, they could use the link to
go back to edit a budget. However, after doing so, they were out of the
budget creation process.

So we're now letting users go back to edit the budget, fix any mistakes
they might have made, and then continue to groups.

app/components/admin/budgets/form_component.html.erb

@@ -37,7 +37,7 @@
     <%= render "/admin/budgets/association", assignable_type: "valuators", assignables: valuators, form: f %>
   </fieldset>
 
-  <% if budget.persisted? %>
+  <% unless wizard? %>
     <fieldset>
       <legend><%= t("admin.budgets.edit.info.phases_settings") %></legend>
       <div class="small-12 medium-6 column">
@@ -52,10 +52,10 @@
 
   <div class="small-12 column">
     <div class="clear small-12 medium-4 large-3 inline-block">
-      <% if budget.persisted? %>
-        <%= f.submit nil, class: "button success" %>
-      <% else %>
+      <% if wizard? %>
         <%= f.submit t("admin.budgets_wizard.budgets.continue"), class: "button success expanded" %>
+      <% else %>
+        <%= f.submit nil, class: "button success" %>
       <% end %>
     </div>
 

app/components/admin/budgets/form_component.rb

@@ -3,14 +3,16 @@ class Admin::Budgets::FormComponent < ApplicationComponent
   include GlobalizeHelper
   include Admin::Namespace
 
-  attr_reader :budget
+  attr_reader :budget, :wizard
+  alias_method :wizard?, :wizard
   delegate :display_calculate_winners_button?,
            :calculate_winner_button_text,
            :calculate_winners_admin_budget_path,
            to: :helpers
 
-  def initialize(budget)
+  def initialize(budget, wizard: false)
     @budget = budget
+    @wizard = wizard
   end
 
   def voting_styles_select_options