feat: passcode lock in preferences (#644)

* feat: implement existing passcode lock in prefs

* chore: cleanup commented code and unused imports

* feat: improve design for passcode lock

* fix: propert folder naming

* feat: passcode lock form buttons margin

app/assets/javascripts/preferences/panes/account/LogOutView.tsx

@@ -71,7 +71,7 @@ const ClearSessionDataView: FunctionComponent<{
     <>
       <PreferencesGroup>
         <PreferencesSegment>
-          <Title>Clear Session Data</Title>
+          <Title>Clear session data</Title>
           <div className="min-h-2" />
           <Text>This will delete all local items and preferences.</Text>
           <div className="min-h-3" />