Issue #2085243 by dawehner: Rename Menu module into Menu UI module.

core/includes/menu.inc

...s/block/lib/Drupal/block/Tests/BlockLanguageCacheTest.php

.../config_translation/Tests/ConfigTranslationListUiTest.php

core/modules/forum/lib/Drupal/forum/Tests/ForumTest.php

core/modules/menu/menu.local_tasks.yml

...odules/menu_link/lib/Drupal/menu_link/Entity/MenuLink.php

...nu_link/lib/Drupal/menu_link/MenuLinkAccessController.php

...menu_link/lib/Drupal/menu_link/MenuLinkFormController.php

core/modules/menu_link/menu_link.module

core/modules/menu_ui/config/menu_ui.settings.yml

core/modules/menu_ui/config/schema/menu_ui.schema.yml

core/modules/menu_ui/css/menu_ui.admin.css

.../menu_ui/lib/Drupal/menu_ui/Controller/MenuController.php

...odules/menu_ui/lib/Drupal/menu_ui/Form/MenuDeleteForm.php

...es/menu_ui/lib/Drupal/menu_ui/Form/MenuLinkDeleteForm.php

...les/menu_ui/lib/Drupal/menu_ui/Form/MenuLinkResetForm.php

...modules/menu_ui/lib/Drupal/menu_ui/MenuFormController.php

core/modules/menu_ui/lib/Drupal/menu_ui/MenuListBuilder.php

...dules/menu_ui/lib/Drupal/menu_ui/MenuListBuilder.php.orig

core/modules/menu_ui/lib/Drupal/menu_ui/MenuSettingsForm.php