feat: warning for protected note without protection

- Use `.sn-button` everywhere
- Delete permissions modal
- Capitalize "Clear session data"

app/assets/javascripts/index.ts

@@ -4,7 +4,6 @@
 import '@reach/dialog/styles.css';
 import 'sn-stylekit/dist/stylekit.css';
 import '../stylesheets/index.css.scss';
-// import '../stylesheets/_reach-sub.scss';
 
 // Vendor
 import 'angular';