Add button to discard an upload

html/template/sync/upload-by-id.html

@@ -222,9 +222,9 @@ document.addEventListener('DOMContentLoaded', onLoad);
 		</div>
 
 		<div class="d-flex justify-content-between mt-4 mb-5">
-			<a href="{{ .URL.PoolCSVUpload }}" class="btn btn-outline-secondary">
-				<i class="bi bi-arrow-left me-1"></i> Upload Edited File
-			</a>
+			<form action="{{ .C.URL.Discard }}" method="POST">
+				<button type="submit" class="btn btn-outline-danger">Discard</button>
+			</form>
 			<button class="btn btn-primary" id="confirmUploadBtn">
 				<i class="bi bi-check2 me-1"></i> Confirm and Submit Data
 			</button>