ensure classes declared outside an IIFE are properties of window

app/assets/javascripts/boards/models/issue.js.es6

app/assets/javascripts/boards/models/label.js.es6

app/assets/javascripts/boards/models/list.js.es6

app/assets/javascripts/boards/models/milestone.js.es6

app/assets/javascripts/boards/models/user.js.es6

app/assets/javascripts/boards/services/board_service.js.es6

app/assets/javascripts/diff_notes/models/discussion.js.es6

app/assets/javascripts/diff_notes/models/note.js.es6

...scripts/environments/services/environments_service.js.es6

...ripts/protected_branches/protected_branch_dropdown.js.es6