Resolve "Visual review is hard to find / confused with review app"

...ripts/environments/components/enable_review_app_modal.vue

...merge_request_widget/components/deployment/deployment.vue

...quest_widget/components/deployment/deployment_actions.vue

..._request_widget/components/deployment/deployment_list.vue

...t_widget/components/deployment/deployment_view_button.vue

...equest_widget/components/mr_widget_pipeline_container.vue

doc/ci/review_apps/img/review_button.png

doc/ci/review_apps/index.md

...erge_request_widget/components/visual_review_app_link.vue

...eatures/merge_request/user_sees_deployment_widget_spec.rb

...mr_widget/components/mr_widget_pipeline_container_spec.js

...ontend/vue_mr_widget/components/visual_review_app_spec.js

locale/gitlab.pot

...ntend/vue_mr_widget/deployment/deployment_actions_spec.js

...frontend/vue_mr_widget/deployment/deployment_list_spec.js