Intermediate commit fixing merge

Merge remote-tracking branch 'remotes/origin/master' into submission

# Conflicts:
#	package.json
#	src/app/+admin/admin-registries/metadata-schema/metadata-schema.component.spec.ts
#	src/app/+search-page/search-service/search.service.spec.ts
#	src/app/app.module.ts
#	src/app/core/auth/auth.interceptor.ts
#	src/app/core/cache/response-cache.service.spec.ts
#	src/app/core/data/browse-response-parsing.service.spec.ts
#	src/app/core/data/data.service.spec.ts
#	src/app/core/data/request.service.spec.ts
#	src/app/core/data/request.service.ts
#	src/app/core/dspace-rest-v2/dspace-rest-v2.service.ts
#	src/app/core/integration/integration.service.ts
#	src/app/core/metadata/metadata.service.spec.ts
#	src/app/core/registry/registry.service.spec.ts
#	src/app/core/shared/collection.model.ts
#	src/app/core/shared/item.model.ts
#	src/app/shared/form/builder/ds-dynamic-form-ui/models/dynamic-group/dynamic-group.component.spec.ts
#	src/app/shared/form/builder/ds-dynamic-form-ui/models/dynamic-group/dynamic-group.components.ts
#	src/app/shared/form/builder/ds-dynamic-form-ui/models/list/dynamic-list.component.ts
#	src/app/shared/form/builder/ds-dynamic-form-ui/models/lookup/dynamic-lookup.component.spec.ts
#	src/app/shared/form/builder/ds-dynamic-form-ui/models/lookup/dynamic-lookup.component.ts
#	src/app/shared/form/builder/ds-dynamic-form-ui/models/scrollable-dropdown/dynamic-scrollable-dropdown.component.ts
#	src/app/shared/form/builder/ds-dynamic-form-ui/models/tag/dynamic-tag.component.spec.ts
#	src/app/shared/form/builder/ds-dynamic-form-ui/models/tag/dynamic-tag.component.ts
#	src/app/shared/form/builder/ds-dynamic-form-ui/models/typeahead/dynamic-typeahead.component.ts
#	src/app/shared/form/builder/form-builder.service.spec.ts
#	src/app/shared/form/form.service.spec.ts
#	src/app/shared/notifications/notification/notification.component.spec.ts
#	src/app/shared/services/route.service.spec.ts
#	src/app/shared/services/route.service.ts
#	src/app/shared/shared.module.ts
#	yarn.lock

On metadata enrichment, When Upload section is disabled, add it to submission only if there are files

Added possibility to show additional information to search results returned by form fields which provide search

Angular6 upgrade

Hide the wrapper component when there is no text content

Fixed issue where facets could not be changed when you are logged in

Conflicts:
	src/app/core/cache/builders/remote-data-build.service.ts
	src/app/core/metadata/metadata.service.ts
	src/app/core/shared/item.model.ts
	src/app/shared/loading/loading.component.ts
	yarn.lock

Issue 313: add support for paginated properties on dspace objects

Issue 311: No files item page bugfix

#293 Added link with the query quoted for search results if empty