APPLE: Add usdView controls to show/hide the sky dome

[creijon]

Description of Change(s)

With 22.11 there was the new domeLightCameraVisibility render setting to hide the sky dome background when the dome light was enabled. This is really useful for displaying quality lighting in the viewport while maintaining a transparent or flat background.

This change hooks up the setting to a new menu item in usdView, under Display -> Show Dome Light Textures

Fixes Issue(s)

• Control of skydome rendering in usdView

• I have verified that all unit tests pass with the proposed changes

• I have submitted a signed Contributor License Agreement

[sunyab]

Filed as internal issue #USD-7819

[FlorianZ]

@jonny-apple, we had our UI/UX design team take a look and they recommended moving this option to the "Display" menu and calling it "Show Dome Light Textures" instead. Would you mind updating the PR with that change? Thank you!

[creijon]

@jonny-apple, we had our UI/UX design team take a look and they recommended moving this option to the "Display" menu and calling it "Show Dome Light Textures" instead. Would you mind updating the PR with that change? Thank you!

Certainly, I'll do that right away.

[creijon]

@jonny-apple, we had our UI/UX design team take a look and they recommended moving this option to the "Display" menu and calling it "Show Dome Light Textures" instead. Would you mind updating the PR with that change? Thank you!

Certainly, I'll do that right away.

Done!

[creijon]

Cleaned up the Python code to use consistent naming.