Add latest changes from gitlab-org/gitlab@master

.gitlab/ci/frontend.gitlab-ci.yml

.gitlab/ci/global.gitlab-ci.yml

.gitlab/ci/rails.gitlab-ci.yml

app/assets/javascripts/gfm_auto_complete.js

...vascripts/ide/components/commit_sidebar/editor_header.vue

...s/javascripts/ide/components/commit_sidebar/list_item.vue

app/assets/javascripts/ide/components/file_row_extra.vue

app/assets/javascripts/ide/components/ide_tree_list.vue

app/assets/javascripts/ide/components/new_dropdown/modal.vue

app/assets/javascripts/ide/components/repo_editor.vue

app/assets/javascripts/ide/lib/files.js

app/assets/javascripts/ide/stores/actions.js

app/assets/javascripts/ide/stores/actions/file.js

app/assets/javascripts/ide/stores/actions/project.js

app/assets/javascripts/ide/stores/modules/commit/actions.js

app/assets/javascripts/ide/stores/mutation_types.js

app/assets/javascripts/ide/stores/mutations.js

app/assets/javascripts/ide/stores/mutations/file.js

app/assets/javascripts/ide/stores/state.js

app/assets/javascripts/ide/stores/utils.js