Add sort option to bookmark list (#522)

* 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

bookmarks/signals.py

@@ -1,14 +1,10 @@
-from os import path
-
+from django.conf import settings
 from django.contrib.auth import user_logged_in
 from django.db.backends.signals import connection_created
 from django.dispatch import receiver
 
 from bookmarks.services import tasks
 
-icu_extension_path = './libicu.so'
-icu_extension_exists = path.exists(icu_extension_path)
-
 
 @receiver(user_logged_in)
 def user_logged_in(sender, request, user, **kwargs):
@@ -19,9 +15,9 @@ def user_logged_in(sender, request, user, **kwargs):
 def extend_sqlite(connection=None, **kwargs):
     # Load ICU extension into Sqlite connection to support case-insensitive
     # comparisons with unicode characters
-    if connection.vendor == 'sqlite' and icu_extension_exists:
+    if connection.vendor == 'sqlite' and settings.USE_SQLITE_ICU_EXTENSION:
         connection.connection.enable_load_extension(True)
-        connection.connection.load_extension('./libicu')
+        connection.connection.load_extension(settings.SQLITE_ICU_EXTENSION_PATH.rstrip('.so'))
 
         with connection.cursor() as cursor:
             # Load an ICU collation for case-insensitive ordering.