Search polish

[colszowka]

Followup to #84 to do some non-MVP-but-still-nice-to-have additions for the search:

• More expansive tests
• Result Pagination
• Show some stats regarding the search (at least total results)
• When submitting an empty form on desktop, the page is very bleak. It should show at least some "please add a query message or so". On mobile this problem is not that prominent since the search input form is full-width and large there.
• Similar issue when submitting a query with 0 results
• Focus the form input on initial access (or empty query) on mobile
• Put the button into bulma's loading state after submit
• Disable form autocompletion on the search input