Merge pull request #1986 from andreytroeglazov/1824-fix-multiple-chec…

…kboxes-submit

Fix multiple checkboxes submit

lib/IHP/static/helpers.js

@@ -278,7 +278,7 @@ window.submitForm = function (form, possibleClickedButton) {
             // of full urls like `http://example.com/Projects`
             var url = new URL(formAction, document.baseURI);
             for (var pair of formData.entries()) {
-                url.searchParams.set(pair[0], pair[1]);
+                url.searchParams.append(pair[0], pair[1]);
             }
 
             request.open(formMethod, url.toString(), true);