fixed issue where the search results would reload when the search method was triggered from somewhere else

Merge branch 'search-features' of https://git.atmire.com/contributions/dspace-angular into search-features

Conflicts:
	src/app/+search-page/search-filters/search-filter/search-filter.service.ts

Conflicts:
	package.json
	src/app/+search-page/search-filters/search-filter/search-facet-filter/search-facet-filter.component.ts
	src/app/+search-page/search-filters/search-filter/search-filter.component.html
	src/app/+search-page/search-page.component.ts
	src/app/+search-page/search-page.module.ts
	src/app/shared/shared.module.ts

Conflicts:
	src/app/core/shared/resource-type.ts
	src/app/shared/shared.module.ts