FLUID-5433: Added aria-label to the upload input
FLUID-5433: Updated unit tests.
Merge remote-tracking branch 'justin/FLUID-5433'

* justin/FLUID-5433:
  FLUID-5433: Updated unit tests.
  FLUID-5433: Added aria-label to the upload input
Merge branch 'master' into FLUID-5432
FLUID-5432: Simplified the remove button aria label in uploader.