Refactor the Study search dropdown to VueJS

[fabd]

The old "autocomplete" Javascript needs to be removed and replaced with a (likely) smaller implementation in VueJS.

Goals

1. pre-requisite to consider improvements to the search box functionality Improve the Study search auto-complete #9

2. may improve response on mobile (we have to include Vue on all pages anyway, so in theory we end up with less Javascript). The dropdown functionality can then be included as part of the Study page Javascript bundle.

Considerations

• I am told that the dropdown doesn't even show on mobile with slow internet. The dropdown needs to be designed as a enhancement of a standard input. The standard input needs to take user to a separate screen with search results (something not implemented yet) (so eg. searching for "mo" would give "moon" "mother" "monk" etc). The dropdown, once active, is a usability improvement, but not requirement for the ability to search.

Status

Until this is solved, #9 is on hold.

Refactoring search box to Vue is a client-side / front-end task, which is suitable for contribution.