Chore: Add display name to the user (#1067)

* Chore: Adding browser info to web widget triggered event

fixes: #970

* Chore: Rename nickname to display name

references: #972

* Chore: Change nickname in code

* chore: fix errors

* Chore: update nginx config

fixes: #1057

* Chore: Fix specs

app/models/user.rb

@@ -9,12 +9,12 @@
 #  confirmed_at           :datetime
 #  current_sign_in_at     :datetime
 #  current_sign_in_ip     :string
+#  display_name           :string
 #  email                  :string
 #  encrypted_password     :string           default(""), not null
 #  last_sign_in_at        :datetime
 #  last_sign_in_ip        :string
 #  name                   :string           not null
-#  nickname               :string
 #  provider               :string           default("email"), not null
 #  pubsub_token           :string
 #  remember_created_at    :datetime
@@ -96,6 +96,10 @@ class User < ApplicationRecord
     account_users.find_by(account_id: Current.account.id) if Current.account
   end
 
+  def display_name
+    self[:display_name].presence || name
+  end
+
   def account
     current_account_user&.account
   end