Fix filter for synonym

Author: Cyperghost

wcfsetup/install/files/lib/system/gridView/admin/TagGridView.class.php

@@ -49,7 +49,7 @@ public function __construct()
             GridViewColumn::for('synonymName')
                 ->label('wcf.acp.tag.synonymFor')
                 ->renderer(new DefaultColumnRenderer())
-                ->filter(new TextFilter())
+                ->filter(new TextFilter("synonym.name"))
                 ->sortable(sortByDatabaseColumn: "synonym.name"),
             GridViewColumn::for('languageName')
                 ->label('wcf.acp.tag.languageID')
@@ -124,6 +124,9 @@ protected function createObjectList(): DatabaseObjectList
             ON          tag.languageID = language.languageID
             LEFT JOIN   wcf1_tag synonym
             ON          tag.synonymFor = synonym.tagID";
+        $list->sqlConditionJoins = "
+            LEFT JOIN   wcf1_tag synonym
+            ON          tag.synonymFor = synonym.tagID";
 
         return $list;
     }