Fixed
- The site panel is always Zia's card, dark in a dark space and light in a
light one, with its text and icons to match. On macOS it showed the
system's own see-through backing instead, which follows macOS's mode (or
Zen's theme) rather than the space, so a light space under dark macOS
had dark text on a dark panel, and Zen's light theme in a dark space
white text on a white one (thanks @OneGunBullet). 2.100.10's fix for
this didn't take: Zen's own rule outranked it.