[Library & common-assets | new-theme]: Updates for redesign.

1. availableOn.component.ts: Updated class of title to "uk-text-light-grey" and added custom-external icon to links and updated accessright icons.
2. citation.class.ts: Added fileFormatOptions: Option[] to use it in input options.
3. citeThis.component.ts: Updated select inputs using "input" from InputComponent | Updated copy to clipboard button to link.
4. citeThis.module.ts: Import InputModule.
5. fos.component.ts: Updated class of title to "uk-text-light-grey".
6. fundedBy.component.ts: Updated class of title to "uk-text-light-grey" and updated links with uk-text-emphasis class.
7. landing-header.component.ts: Increase authorsLimit to 7 | Changed class of "under curation" to uk-text-primary (used to be custom class).
8. metrics.component.ts: Updated in clickOutside event.
parsingFunctions.class.ts: Updated open, closed and unknown with icon names instead of paths to svgs (download accessright icons).
9. relatedTo.component.ts: Updated class of title to "uk-text-light-grey" and added custom-external for links.
10. resultLandingUtils.module.ts: Inport AlertModalModule (to open modal).
11. sdg.component.ts: Updated class of titlte to "uk-text-light-grey".
12. showIdentifiers.component.ts: Added view more functionality.
13. showPublisher.component.ts: Updated custon-external class.
14. resultLanding.module.ts: registerIcon link.
15. resultLanding.component.html: Updated css for result landing and commented annotations (b2note).
16. orcid-work.component.ts: Updated orcid action button for landing page.
17. orcid.module.ts: registerIcons orcid_add and orcid_bin.
18. customOptions.class.ts: [Bug fix] [By Kostis] registryOptions() was not returning properly httpHeaders.
19. showAuthors.component.ts: Updated css
20. icons.ts: Export svgs orcid_add, orcid_bin, link.
21. alert.ts: Removed margin from title.
22. result-preview.component.html: Title of results set to <h2> and uk-h6 and when links to uk-link-heading | accessRightIcon for hostedBy_collectedFrom.
23. result-preview.module.ts: Imported IconsModule.
24. landing-utils.css: Updates in landing css & css of landing-action-button & added backdrop filter missing rules.
25. utils.css: Updated class orcid-clipboard-wrapper and renamed to clipboad-wrapper | Update class .custom-external to set in content with code instead of name and updated not to underline it on hover
26. library.css: Added class .default-dropdown with max-width: 500px;

explore/src/app/openaireLibrary

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-Subproject commit cee1d9f8767063877438665f13d34148a6fe531b
+Subproject commit e28e06b2392827b52198220ac69a3c54b60bb0de

explore/src/assets/common-assets

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-Subproject commit cc2719364d8d553a8ea6585ff651b3858fc1d6a0
+Subproject commit 468555a58f5808dbd8b6657ae0360fb7d0d4ab75