Add the Item Withdraw and Reistate action
Add the make Item Private and Public action
Add the Permanently Delete action

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

If there is an error 400 or a search returns an empty result this commit will show a link with the query quoted. 
Also improved testing of search results component as the component has changed.

Hide metadata labels without value

Conflicts:
	package.json
	src/app/+search-page/search-filters/search-filters.component.ts
	src/app/core/auth/auth.effects.ts
	src/app/core/auth/auth.service.ts
	src/app/core/auth/server-auth.service.ts
	src/app/core/data/comcol-data.service.ts
	src/app/core/data/community-data.service.ts
	src/app/core/data/data.service.ts
	src/app/core/data/item-data.service.ts
	src/app/core/shared/dspace-object.model.ts
	src/app/header/header.component.spec.ts
	src/app/shared/auth-nav-menu/auth-nav-menu.component.ts
	src/app/shared/testing/auth-service-stub.ts
	yarn.lock

Initial German Translation 

Issue #295 Dutch translation

Czech translation