Enable alphabetisation of imports

Description

@markrian suggested enabling alphabetisation of imports rule.

Enabling this rule requires updating a lot of files. We should consider splitting this change into smaller merge requests. See below.

Plan

  • Update ee/app/assets/javascripts and ee/spec/frontend
  • Enable ESLint rule for EE code
  • Update app/assets/javascripts
  • Update spec/frontend
  • Re-run rule on all JavaScript files and submit a MR if any file changed.
  • Submit MR to enable this rule
  • Enable ESLint rule globally
  • Announce in #frontend about this change.
Edited by Vitaly Slobodin