- While a search is in flight:
  - disable the "Go" button
  - show a spinner in the search results section
- Add two preset sizes (40x40 and 30x30px) to the CircleLoader
- CSS fixes to get rid of the unnecessary vertical scrollbar in an inner element within the sidebar modal
- Disabled spellchecking in input fields by default
- Added typed useAppDispatch and useAppSelector hooks, which correctly infer the types of the redux state
   and of return values of redux middleware, as suggested in the docs.
- Using a simple fetch instead of the apiService for requests to search api.