This filter determines which tiddlers will be saved to local storage.
* `[prefix[$:/state/]] -[prefix[$:/state/popup/]]` - the default value. Save state tiddlers except popup state tiddlers, thus preserving selected tabs and the open/closed status of table of contents entries. Any other tiddlers created or changed will be lost after reloading the page.
* `[all[]]` - attempt to save all changed tiddlers. This means even popup state tiddlers and temporary tiddlers will be saved. In addition, when a plugin is installed, all the shadow tiddlers are individually "exploded" into local storage. Deleting the plugin requires deleting all the tiddlers individually. Not recommended unless these issues are unimportant.
* `[all[]] -[is[shadow]!is[tiddler]] -[prefix[$:/state/popup/]] -[prefix[$:/temp/]] -[prefix[$:/HistoryList]]` - save all tiddlers except unmodified shadow tiddlers, popup state tiddlers, temp tiddlers and the history list. Solves the aforementioned issues with `[all[]]`. Recommended.