Hack to hide high-vertex-count drawables

[eundersander]

Motivation and Context

Hack to hide high-vertex-count drawables and replace them with wireframe bounding boxes. See ResourceManager.cpp threshold to tune. This is a workaround for displaying Floorplanner scenes in the SIRo sandbox tool on older Macbooks.

We probably won't merge any version of this to main.

How Has This Been Tested

Local testing on 2019 Macbook Pro.

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have completed my CLA (see CONTRIBUTING)
• I have added tests to cover my changes.
• All new and existing tests passed.