Merge branch 'remove-jquery-ui-datepicker' into 'master'

app/assets/javascripts/application.js

...assets/javascripts/boards/filters/due_date_filters.js.es6

app/assets/javascripts/dispatcher.js.es6

app/assets/javascripts/due_date_select.js.es6

app/assets/javascripts/gl_dropdown.js

app/assets/javascripts/issuable_form.js

app/assets/javascripts/member_expiration_date.js.es6

app/assets/stylesheets/application.scss

app/assets/stylesheets/framework/calendar.scss

app/assets/stylesheets/framework/dropdowns.scss

app/assets/stylesheets/framework/jquery.scss

app/assets/stylesheets/pages/profile.scss

app/views/profiles/personal_access_tokens/index.html.haml

app/views/shared/milestones/_form_dates.html.haml

changelogs/unreleased/remove-jquery-ui-datepicker.yml

package.json

spec/features/boards/sidebar_spec.rb

spec/features/issues_spec.rb

spec/features/profiles/personal_access_tokens_spec.rb

...s/members/master_adds_member_with_expiration_date_spec.rb