Feature: Ability to switch between multiple accounts (#881)

* Feature: Ability to switch between multiple accounts

* Fix rubocop

* Fix assigned inboxes

* fix auth json

* Add account switcher in UI

* fix ordering on administrate

* Add switch accounts to sidebar

* add account id

* Fix schema.rb timestamp

* Revert "add account id"

This reverts commit 27570f50ef584cb9a5f69454f43f630b318c8807.

* Add a check for account

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

spec/mailers/confirmation_instructions_spec.rb

@@ -27,6 +27,7 @@ RSpec.describe 'Confirmation Instructions', type: :mailer do
       let(:inviter_val) { create(:user, :administrator, skip_confirmation: true, account: account) }
 
       it 'refers to the inviter and their account' do
+        Current.account = account
         expect(mail.body).to match(
           "#{CGI.escapeHTML(inviter_val.name)}, with #{CGI.escapeHTML(inviter_val.account.name)}, has invited you to try out Chatwoot!"
         )