Merge branch 'master' into configurable_entities

config/environment.default.js

package.json

resources/i18n/en.json

resources/images/dspace-logo-mini.svg

resources/images/dspace-logo.png

resources/images/dspace-logo.svg

...n-registries/metadata-schema/metadata-schema.component.ts

...dmin-sidebar-section/admin-sidebar-section.component.html

...dmin-sidebar-section/admin-sidebar-section.component.scss

...n-sidebar-section/admin-sidebar-section.component.spec.ts

.../admin-sidebar-section/admin-sidebar-section.component.ts

src/app/+admin/admin-sidebar/admin-sidebar.component.html

src/app/+admin/admin-sidebar/admin-sidebar.component.scss

src/app/+admin/admin-sidebar/admin-sidebar.component.spec.ts

src/app/+admin/admin-sidebar/admin-sidebar.component.ts

...r-section/expandable-admin-sidebar-section.component.html

...r-section/expandable-admin-sidebar-section.component.scss

...ection/expandable-admin-sidebar-section.component.spec.ts

...bar-section/expandable-admin-sidebar-section.component.ts

src/app/+admin/admin.module.ts