[App] Features fixes

[W01fw00d]

• [x] Unit tests: npm run utest-cover and check coverage
• [x] Functional tests: npm run dev-front and npm run ftest-mobile and npm run ftest-desktop
• [x] Run App: npm run build and npm run dev-start -> check that no errors/warnings appear in browser console
• [x] Run App with Chrome Devtools Mobile Device Screen
• [x] Upgrade version
• [x] Update to last version of chemistry-ui
• [ ] Deploy in Heroku before merging in case of potential breaking changes

Fixes https://github.com/W01fw00d/cooking-with-amateurs/projects/1#card-75167322