Uploading a GLTF file via model importer without a .bin silently fails

[AtlasLinden]

Environment

Second Life Project Gltf Mesh Import 7.1.14.15830455952 (64bit)

Description

It's possible to select a .gltf file for upload that does not correlate with a binary file.
This causes a blank Upload Model floater to appear with no dialog or prompt stating that the file is invalid.

Uploading a similar file via Upload>Material can give the following prompt:

Reproduction steps

1. Download any gltf model and remove the .bin file associated with it (or alternatively download only the duck.gltf file here)
2. Attempt to upload the .gltf file via Build>Upload>Model