[MCM-1250] assert when you have an add block in your inventory that doesn't have geo

Partner Rank: 4

Partner Team Reporting: Jigarbov Productions

Verification builds: 1.16.200.01

Summary:
assert when drawing an add block without geometry in auto complete/inventory

Impact:
Asserts are bad and can result in failures during cert and content review if they're not caught and logged. While there is no apparent gameplay impact, it's clear there is something going wrong under the hood.

Repro Steps:

Download the attached world no geo assert.mcworld
open the world
do /give @p design:disco_floor

Observed Results:
as the auto complete finishes, you start getting spammed to hell with this assert:

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Assert Failure - ctrl+C to copy this message to the clipboard!
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Assertion failed: UI mesh vertex format size = 0, indicates empty mesh
Condition is false: false
Function: mce::framebuilder::bgfxbridge::BgfxFrameExtractor::_createUIElement in F:\DarwinWork\1119\s\handheld\src-deps\MinecraftRenderer\src\framebuilder\bgfxbridge\BgfxFrameExtractor.cpp @ 3125

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OK
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Expected Results:
clone and structure load should give consistent results, or there should be something that allows better manipulation of water in the case of structure such as a command argument

Screenshots/Videos attached: sure.

Regression Builds:
1.16.200.55