Add Features: allowing lists to be sorted by modifiedAt when not in draggable mode.

Bug Fix #2093: the broken should be prior to file attachment feature introduced, and tested export board is working.

Thanks to whowillcare !

( xet7 merged this pull request manually from https://github.com/wekan/wekan/pull/2756 )

Closes #2093

models/boards.js

@@ -409,6 +409,23 @@ Boards.helpers({
   },
 
   lists() {
+    const enabled = Meteor.user().hasSortBy();
+    return enabled ? this.newestLists() : this.draggableLists();
+  },
+
+  newestLists() {
+    // sorted lists from newest to the oldest, by its creation date or its cards' last modification date
+    const value = Meteor.user()._getListSortBy();
+    const sortKey = { starred: -1, [value[0]]: value[1] }; // [["starred",-1],value];
+    return Lists.find(
+      {
+        boardId: this._id,
+        archived: false,
+      },
+      { sort: sortKey },
+    );
+  },
+  draggableLists() {
     return Lists.find({ boardId: this._id }, { sort: { sort: 1 } });
   },