[IMP] *: coherent hotkey uses

This commit makes hotkey uses more coherent throughout the entire
codebase by setting alt+q as main shortcurt for confirm and default
actions and alt+x for cancel actions.

task-3370463

closes odoo/odoo#127469

Related: odoo/enterprise#43694
Signed-off-by: Mathieu Duckerts-Antoine (dam) <dam@odoo.com>

addons/snailmail/wizard/snailmail_letter_format_error_views.xml

@@ -14,7 +14,7 @@
                 <footer>
                     <button string="Update Config and Re-send" name="update_resend_action" type="object" class="btn-primary" data-hotkey="q"/>
                     <button string="Cancel Letter" name="cancel_letter_action" type="object" class="btn-primary" data-hotkey="w"/>
-                    <button string="Close" class="btn-secondary" special="cancel" data-hotkey="z"/>
+                    <button string="Close" class="btn-secondary" special="cancel" data-hotkey="x"/>
                 </footer>
             </form>
         </field>

addons/snailmail/wizard/snailmail_letter_missing_required_fields_views.xml

@@ -23,7 +23,7 @@
                 <footer>
                     <button string="Update address and re-send" type="object" name="update_address_save" class="btn-primary" data-hotkey="q"/>
                     <button string="Cancel letter" type="object" name="update_address_cancel" class="btn-secondary" data-hotkey="w"/>
-                    <button string="Close" special='cancel' class="btn-secondary" data-hotkey="z"/>
+                    <button string="Close" special='cancel' class="btn-secondary" data-hotkey="x"/>
                 </footer>
             </form>
         </field>