Add button to clear transaction and restart

lang/en_us.php

@@ -138,4 +138,6 @@ define("STRINGS", [
     "card x saved" => "Gift card #{arg} updated.",
     "open drawer" => "Open Drawer",
     "no items" => "No items in transaction.",
+    "delete transaction" => "Delete transaction",
+    "transaction discount" => "Transaction discount"
 ]);

pages/pos.php

@@ -269,6 +269,10 @@ if (isset($_GET['switch']) || !isset($_SESSION['register']) || !$registeropen) {
                         <?php
                     }
                     ?>
+                    <div class="btn m-1" id="deletetxbtn">
+                        <i class="fas fa-trash"></i>
+                        <span class="sr-only"><?php lang("delete transaction"); ?></span>
+                    </div>
                 </div>
 
                 <div class="card-body d-md-none">

static/js/pos.js

@@ -56,6 +56,12 @@ function recalculate() {
     $("#receiptchange").text(change.toFixed(2));
 }
 
+$("#deletetxbtn").click(function () {
+    bsalert("Confirm", "Really delete transaction?", "Yes", "No", function () {
+        window.location.href = "app.php?page=pos";
+    });
+});
+
 // Make sure the session doesn't expire
 setInterval(function () {
     $.get("action.php", {action: "session_keepalive"});