Potted mangrove propagules appear darker than they should due to shading not being disabled

The bug

As described in MC-262676, placed mangrove propagules appear darker than they should appear. The same is true for when placed in flower pots (however is harder to see than in the MC-129826 cases due to MC-262644 masking it for mangrove propagules).

How to fix

The first four elements in potted_mangrove_propagule.json can have

"shade": false

added to them to remove this shading and fix this issue. A model file that implements this fix is attached. Also attached is a model file which uses the optimized pot system described in MC-262433, a bug which I highly recommend fixing because it's incredibly easy to and benefits performance.