Stained Glass is missing in the editor

All colours of stained glass and stained glass panes are missing from the editor block selection. Normal glass, normal panes, and tinted glass are present.

Steps to reproduce:

1. In editor mode, open the block selection menu.

2. Search for stained glass, or any keywords that would relate to it.

Expected outcome: Stained glass is available to use.

Actual outcome: Stained glass is missing.