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

client/lib/filter.js

@@ -439,6 +439,14 @@ class AdvancedFilter {
     const commands = this._filterToCommands();
     return this._arrayToSelector(commands);
   }
+  getRegexSelector() {
+    // generate a regex for filter list
+    this._dep.depend();
+    return new RegExp(
+      `^.*${this._filter.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')}.*$`,
+      'i',
+    );
+  }
 }
 
 // The global Filter object.
@@ -455,6 +463,7 @@ Filter = {
   hideEmpty: new SetFilter(),
   customFields: new SetFilter('_id'),
   advanced: new AdvancedFilter(),
+  lists: new AdvancedFilter(), // we need the ability to filter list by name as well
 
   _fields: ['labelIds', 'members', 'archive', 'hideEmpty', 'customFields'],
 
@@ -533,6 +542,7 @@ Filter = {
       const filter = this[fieldName];
       filter.reset();
     });
+    this.lists.reset();
     this.advanced.reset();
     this.resetExceptions();
   },