Removal of filtered-discovery-page in Angular

Use the improved DSpace Docker Compose files to create the ci image

Bump mixin-deep from 1.3.1 to 1.3.2

Bumps [mixin-deep](https://github.com/jonschlinkert/mixin-deep) from 1.3.1 to 1.3.2.
- [Release notes](https://github.com/jonschlinkert/mixin-deep/releases)
- [Commits](https://github.com/jonschlinkert/mixin-deep/compare/1.3.1...1.3.2

)

Signed-off-by: dependabot[bot] <support@github.com>

Convert i18n files to JSON5 format

Fix travis chrome install issue

Move item component

Merge remote-tracking branch 'atmire-git/w2p-64644_Removal-of-filtered-discovery-page' into 64644-Removal-of-filtered-discovery-page

Merge remote-tracking branch 'atmire-git/64644-Removal-of-filtered-discovery-page' into 64644-Removal-of-filtered-discovery-page

Search performance optimisations #2

Start Docker Compose for end-to-end (e2e) Testing

Typo in dropdown-field-parser.ts fixed

Clean build folder pre-tests

master travis test fixes

UI language cookie

Item relations edit delete

Entities grid templates

Collection pages, recent submissions: Added "empty" message