Statistics screen sprites render translucent pixels as opaque

More loosely relates to these issues: MC-144009 MC-145821 MC-164001 MC-165403

The bug

None of the textures in gui/sprites/statistics will render as translucent if given textures containing translucent pixels, unlike many other user interface elements.

How to reproduce

1. Download and apply the attached resource pack
2. Enter the items statistics screen

Expected results

Translucent squares.

Actual results

Opaque squares.