Move some components into /app/components

...ient/app/admin/metadata/components/MetadataField.react.js

...ent/app/admin/metadata/components/MetadataHeader.react.js

...ent/app/admin/metadata/components/MetadataSchema.react.js

...ient/app/admin/metadata/components/MetadataTable.react.js

.../app/admin/metadata/components/MetadataTableList.react.js

...ent/app/admin/settings/components/SettingsHeader.react.js

...nt/app/admin/settings/components/SettingsSetting.react.js

...ntend_client/app/components/CreateDashboardModal.react.js

...ontend_client/app/components/DeleteQuestionModal.react.js

resources/frontend_client/app/components/Icon.react.js

resources/frontend_client/app/components/Input.react.js

...es/frontend_client/app/components/LoadingSpinner.react.js

resources/frontend_client/app/components/Modal.react.js

...urces/frontend_client/app/components/ProgressBar.react.js

...rontend_client/app/components/QuestionSavedModal.react.js

...frontend_client/app/components/SaveQuestionModal.react.js

resources/frontend_client/app/components/SaveStatus.react.js

resources/frontend_client/app/components/Select.react.js

resources/frontend_client/app/components/Toggle.react.js

.../frontend_client/app/query_builder/action_button.react.js