[ddbnext-27] working with JS Object
[ddbnext-27] remove base URI
[ddbnext-27] refactoring
[ddbnext-27] the user can now filter the institution by their first letter.

  how to filter:
  - either by modifying the URI in the Web Browser's Address Bar,
  - or clicking the index link in the page.

  FIXME:
  - the select All rendering performance is slow
add total number of institution

refactor code

  - move to smaller methods
hide `filter by sector` box
Merge branch 'feature/ddbnext-27-experimental' into feature/ddbnext-27