Rename module from cyp_withdrawalbutton to simple_withdrawalbutton

- Main file: cyp_withdrawalbutton.php -> simple_withdrawalbutton.php
- Admin controller: AdminCypWithdrawalController.php -> AdminSimpleWithdrawalController.php
- Class: Cyp_Withdrawalbutton -> Simple_withdrawalbutton
- DB table: cyp_withdrawal_request -> simple_withdrawal_request
- Config keys: CYP_WITHDRAWAL_* -> SIMPLE_WITHDRAWAL_*
- Admin tab: AdminCypWithdrawal -> AdminSimpleWithdrawal
- All template mod attributes updated

views/templates/hook/customer_account.tpl

@@ -1,6 +1,6 @@
 <a class="col-lg-4 col-md-6 col-sm-6 col-xs-12" id="withdrawal-link" href="{$withdrawal_link|escape:'html':'UTF-8'}" rel="nofollow">
   <span class="link-item">
     <i class="material-icons">undo</i>
-    {l s='Vertrag widerrufen' mod='cyp_withdrawalbutton'}
+    {l s='Vertrag widerrufen' mod='simple_withdrawalbutton'}
   </span>
 </a>

views/templates/hook/footer.tpl

@@ -1,5 +1,5 @@
 <div class="cyp-withdrawal-footer" style="margin-top: 1rem;">
   <a href="{$withdrawal_link|escape:'html':'UTF-8'}" class="cyp-withdrawal-link" rel="nofollow">
-    {l s='Vertrag widerrufen' mod='cyp_withdrawalbutton'}
+    {l s='Vertrag widerrufen' mod='simple_withdrawalbutton'}
   </a>
 </div>