Terracotta does not come before its colored variations in the creative inventory

The bug

Terracotta is present in the creative inventory after its colored variations. This is inconsistent with candles, which has its non-colored variant before the colored variations.

Clones MC-201592 and relates to MC-203640 and MC-1797.

This affects 1.16.4 as well, but it is only a valid report in 20w45a+ since creative inventory bugs that weren't introduced in the latest snapshot are considered duplicates of MC-1797.

How to reproduce

1. Open the creative inventory
2. Search for candle
   Notice how the non-colored candle is present before the colored variations
3. Search for terracotta
   Notice how the non-colored terracotta is present after the colored variations