Resolve Many field has no validate number in Checkout settings issue24307

Author: edenduong

app/code/Magento/Checkout/etc/adminhtml/system.xml

@@ -27,19 +27,22 @@
                 </field>
                 <field id="max_items_display_count" translate="label" type="text" sortOrder="30" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                     <label>Maximum Number of Items to Display in Order Summary</label>
+                    <validate>validate-zero-or-greater validate-digits</validate>
                 </field>
             </group>
             <group id="cart" translate="label" sortOrder="2" showInDefault="1" showInWebsite="1" showInStore="1">
                 <label>Shopping Cart</label>
                 <field id="delete_quote_after" translate="label" type="text" sortOrder="1" showInDefault="1" showInWebsite="1" showInStore="0" canRestore="1">
                     <label>Quote Lifetime (days)</label>
+                    <validate>validate-zero-or-greater validate-digits</validate>
                 </field>
                 <field id="redirect_to_cart" translate="label" type="select" sortOrder="2" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                     <label>After Adding a Product Redirect to Shopping Cart</label>
                     <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                 </field>
                 <field id="number_items_to_display_pager" translate="label" type="text" sortOrder="2" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                     <label>Number of Items to Display Pager</label>
+                    <validate>validate-zero-or-greater validate-digits</validate>
                 </field>
                 <field id="crosssell_enabled" translate="label" type="select" sortOrder="3" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                     <label>Show Cross-sell Items in the Shopping Cart</label>
@@ -61,9 +64,11 @@
                 </field>
                 <field id="count" translate="label" type="text" sortOrder="2" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                     <label>Number of Items to Display Scrollbar</label>
+                    <validate>validate-zero-or-greater validate-digits</validate>
                 </field>
                 <field id="max_items_display_count" translate="label" type="text" sortOrder="3" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                     <label>Maximum Number of Items to Display</label>
+                    <validate>validate-zero-or-greater validate-digits</validate>
                 </field>
             </group>
             <group id="payment_failed" translate="label" type="text" sortOrder="100" showInDefault="1" showInWebsite="1" showInStore="1">