feat: add favorites support

src/app/modules/menu/context/context-menu.service.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020 StApps
+ * Copyright (C) 2020-2021 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.

src/app/modules/menu/context/context-type.ts

@@ -14,6 +14,8 @@
  */
 import {SCFacet, SCFacetBucket} from '@openstapps/core';
 
+export type ContextType = FilterContext | SortContext;
+
 /**
  * A sort context
  */