Chore: Web widget Inbox Tech Debts (#738)

* Chore: Webwidget Inbox Tech Debts

* Additional customization options creating Web Widget
* Changes to edit Page for Web Widget
* Remove the WebWidget API end points
* Minor chores

Address: #680, #502

Co-authored-by: Pranav Raj Sreepuram <pranavrajs@gmail.com>

app/models/channel/facebook_page.rb

@@ -3,7 +3,6 @@
 # Table name: channel_facebook_pages
 #
 #  id                :integer          not null, primary key
-#  name              :string           not null
 #  page_access_token :string           not null
 #  user_access_token :string           not null
 #  created_at        :datetime         not null
@@ -18,23 +17,19 @@
 #
 
 class Channel::FacebookPage < ApplicationRecord
+  # FIXME: this should be removed post 1.4 release. we moved avatars to inbox
   include Avatarable
 
   self.table_name = 'channel_facebook_pages'
 
   validates :account_id, presence: true
   validates :page_id, uniqueness: { scope: :account_id }
-  has_one_attached :avatar
   belongs_to :account
 
   has_one :inbox, as: :channel, dependent: :destroy
 
   before_destroy :unsubscribe
 
-  def name
-    'Facebook'
-  end
-
   private
 
   def unsubscribe