* master:
  Fix background migration cleanup specs
  Fix JS; make buttons sr accessibile; fix overlay
  Isolate stage_id reference clean up migration
  Fix eslint
  Make sidebar accessible on mobile
  Add mobile navigation on project page
  Fix database schema version number
  Fix background migrations module specs
  Remove migration dependency from stage_id migration
  Remove obsolete argument from bg migrations code
  Add specs for stage_id reference cleanup migration
  Add pending set of specs for stage_id cleanup migration
  Rename stage_id reference clean up migration
  Implement build stage_id reference migration clean up