Merge 018abdcd80 into f05566d925

* master: (92 commits)
  [pylint] engines/currency_convert.py
  Update searx.data - update_firefox_version.py
  Update searx.data - update_ahmia_blacklist.py
  Update searx.data - update_currencies.py
  Update searx.data - update_wikidata_units.py
  [build] /static
  [simple] improve margin of #linkto_preferences
  [fix] engines description - currency_convert.py
  [simple] add aria-label to preferences link
  [simple] link preferences on /about and /stats
  [mod] tineye engine: minor changes
  [fix] 1x engine
  [build] /static
  [simple] introduce page_with_header.html template
  [mod] tineye engine: set engine_type to 'online_url_search'
  [enh] implement a OnlineUrlSearchProcessor
  Fix setup.py help folder
  [build] /static
  [fix] simple theme: /preferences: cookies table is LTR
  [mod] remove deprecate code
  ...

searx/preferences.py

@@ -260,7 +260,8 @@ class BooleanChoices:
 
         disabled = self.transform_form_items(items)
         for setting in self.choices:
-            self.choices[setting] = setting not in disabled
+            if setting in disabled:
+                self.choices[setting] = False
 
     @property
     def enabled(self):