Use items-list sort order for report from collection or saved search

https://forums.zotero.org/discussion/99284/exporting-a-report-sorted-by-first-date

Regression from HTML tree

chrome/content/zotero/itemTree.jsx

@@ -1808,6 +1808,11 @@ var ItemTree = class ItemTree extends LibraryTree {
 		return this._rows.map(row => asIDs ? row.ref.id : row.ref);
 	}
 
+	/**
+	 * Get the current sort order of the items list
+	 *
+	 * @return {Number} - -1 for descending, 1 for ascending
+	 */
 	getSortDirection(sortFields) {
 		sortFields = sortFields || this.getSortFields();
 		if (this.collectionTreeRow.isFeed()) {

chrome/content/zotero/reportInterface.js

@@ -30,9 +30,8 @@ var Zotero_Report_Interface = new function() {
 	 */
 	this.loadCollectionReport = function () {
 		var sortColumn = ZoteroPane_Local.getSortField();
-		var sortDirection = ZoteroPane_Local.getSortDirection();
 		var queryString = '?sort=' + sortColumn
-			+ '&direction=' + (sortDirection == 'ascending' ? 'asc' : 'desc');
+			+ '&direction=' + (ZoteroPane.getSortDirection() == 1 ? 'asc' : 'desc');
 		
 		var url = 'zotero://report/';