app: No diorama for avatars at "Medium" details

[alisaad673]

No diorama view appears when we switch the settings to " Medium" in Character details settings.

bandicam.2022-03-08.18-14-24-433.mp4

[avaer]

• The medium avatar should be used for depth passes
• The full avatar avatar app, regardless of fidelity subapps, should be rendered in the diorama

[0reo]

PR's webaverse/totum#76 & webaverse/totum#78 are dependencies for addressing this