implements reset incoming email token on issues modal and account page,

app/assets/javascripts/issuable.js.es6

app/assets/stylesheets/pages/profile.scss

app/controllers/profiles_controller.rb

app/controllers/projects_controller.rb

app/helpers/accounts_helper.rb

app/models/project.rb

app/models/user.rb

app/views/profiles/accounts/show.html.haml

app/views/projects/issues/_issue_by_email.html.haml

...logs/unreleased/use-separate-token-for-incoming-email.yml

config/routes/project.rb

db/schema.rb

features/profile/profile.feature

features/steps/profile/profile.rb

lib/gitlab/email/handler.rb

lib/gitlab/incoming_email.rb

spec/controllers/projects_controller_spec.rb

spec/features/issues_spec.rb

spec/features/profile_spec.rb

spec/features/projects/issues/issues_spec.rb