Two holes in the blur's property panel, both of which also affected other layers:
- X/Y/W/H were gated on IsWebcamSelected, so a blur (or an image, chat box or alert zone)
had no numeric position or size at all — only dragging. The block is generic: it always
edited SelectedElement's own values, so the gate was the only thing excluding them.
- Opacity showed for a blur, but the compositor's blur reads BlurAmount — the slider would
have moved a number that changes nothing in the output. Hidden for blur layers.
Blur panel is now: Box | Circle, strength, and the shared geometry fields.