CE-1775: Replace loading indicators with skeletons
Related merge request: ce-ui-common!70 (merged) Hint to try: https://confluence.esss.lu.se/pages/viewpage.action?spaceKey=IS&title=Frontend+Testing+with+ce-ui-common+dependencies
Related merge request: ce-ui-common!70 (merged) Hint to try: https://confluence.esss.lu.se/pages/viewpage.action?spaceKey=IS&title=Frontend+Testing+with+ce-ui-common+dependencies