Previously, the 'sanitize' function would throw an error when 'text' was None. This commit fixes the issue by adding a check to handle the case where 'text' is None, returning an empty string instead.
Closes#568
* Add indicator for modified filters
* Rename shared filter values
* Add update search preferences handler
* Separate search and preferences forms
* Properly initialize bookmark search from get or post
* Add tests for applying search preferences
* Implement saving search preferences
* Remove bookmark search query alias
* Use search preferences as default
* Only show save button for authenticated users
* Only show modified indicator if preferences are modified
* Fix overriding search preferences
* Add missing migration
* Rename BookmarkFilters to BookmarkSearch
* Refactor queries to accept BookmarkSearch
* Sort query by data added and title
* Ensure pagination respects search parameters
* Ensure tag cloud respects search parameters
* Ensure user select respects search parameters
* Ensure return url respects search options
* Fix passing search options to user select
* Fix BookmarkSearch initialization
* Extract common search form logic
* Ensure partial update respects search options
* Add sort UI
* Use custom ICU collation when sorting with SQLite
* Support sort in API
