Security update & Bug fix release.

• Update the CC Libraries panel
• Add the default environment light “Studio black light soft” as a selectable item in the starter assets panel
• Add a tooltip with the name of the environment light on the image swatch in environment light properties

• Fix various minor issues with USD import and export
• Fix a rare issue where visible-if properties from sbsar materials would not reveal when expected
• Fix an issue that would cause importing meshes from glTF files to fail
• Fix an issue where imported lights were recognized as cameras
• Update the Sketchup files importer for security fixes