Chore: Contact Sidebar, conversation cleanup (#908)

- Update sidebar design
- Move every contact data to contacts module
- Revert go to next conversation feature
- Fix issues with new conversation in action cable
- Escape HTML content
- Broadcast event when conversation.contact changes.

Co-authored-by: Sojan <sojan@pepalo.com>

app/javascript/shared/helpers/HTMLSanitizer.js

@@ -0,0 +1,8 @@
+export const escapeHtml = (unsafe = '') => {
+  return unsafe
+    .replace(/&/g, '&')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+    .replace(/"/g, '&quot;')
+    .replace(/'/g, '&#039;');
+};