Use regular asynctasks for order PDF generation

src/pretix/static/pretixbase/js/asyncdownload.js

@@ -1,61 +0,0 @@
-/*global $, waitingDialog, gettext */
-var async_dl_url = null;
-var async_dl_timeout = null;
-
-function async_dl_check() {
-    "use strict";
-    $.ajax(
-        {
-            'type': 'GET',
-            'url': async_dl_url + '?ajax=1',
-            'success': async_dl_check_callback,
-            'error': async_dl_check_error,
-            'context': this,
-            'dataType': 'json'
-        }
-    );
-}
-
-function async_dl_check_callback(data, jqXHR, status) {
-    "use strict";
-    if (data.ready && data.redirect) {
-        $("body").data('ajaxing', false);
-        location.href = data.redirect;
-        waitingDialog.hide();
-        return;
-    }
-    async_dl_timeout = window.setTimeout(async_dl_check, 250);
-    $("#loadingmodal p").text(gettext('Your request has been queued on the server and will now be ' +
-                                      'processed. If this takes longer than two minutes, please contact us or go ' +
-                                      'back in your browser and try again.'));
-}
-
-function async_dl_check_error(jqXHR, textStatus, errorThrown) {
-    "use strict";
-    $("body").data('ajaxing', false);
-    waitingDialog.hide();
-    var c = $(jqXHR.responseText).filter('.container');
-    if (c.length > 0) {
-        ajaxErrDialog.show(c.first().html());
-    } else if (jqXHR.status >= 400) {
-        alert(gettext('An error of type {code} occurred.').replace(/\{code\}/, jqXHR.status));
-    }
-}
-
-$(function () {
-    "use strict";
-    $("body").on('click', 'a[data-asyncdownload]', function (e) {
-        e.preventDefault();
-        if ($("body").data('ajaxing')) {
-            return;
-        }
-        async_dl_url = $(this).attr("href");
-        $("body").data('ajaxing', true);
-        waitingDialog.show(gettext('We are processing your request …'));
-        $("#loadingmodal p").text(gettext('We are currently sending your request to the server. If this takes longer ' +
-                                          'than one minute, please check your internet connection and then reload ' +
-                                          'this page and try again.'));
-
-        async_dl_check();
-    });
-});

src/pretix/static/pretixpresale/scss/main.scss

@@ -278,5 +278,9 @@ details summary {
     transform: rotate(180deg);
 }
 
+form.download-btn-form {
+    display: inline;
+}
+
 @import "_iframe.scss";
 @import "_a11y.scss";