config: macos blur settings enable blur on non-Mac

src/config/Config.zig

@@ -933,6 +933,9 @@ palette: Palette = .{},
 ///   * `macos-glass-regular` - Standard glass effect with some opacity
 ///   * `macos-glass-clear` - Highly transparent glass effect
 ///
+/// If the macOS values are set, then this implies `background-blur = true`
+/// on non-macOS platforms.
+///
 /// Supported on macOS and on some Linux desktop environments, including:
 ///
 ///   * KDE Plasma (Wayland and X11)
@@ -8368,6 +8371,11 @@ pub const BackgroundBlur = union(enum) {
             .false => false,
             .true => true,
             .radius => |v| v > 0,
+
+            // We treat these as true because they both imply some blur!
+            // This has the effect of making the standard blur happen on
+            // Linux.
+            .@"macos-glass-regular", .@"macos-glass-clear" => true,
         };
     }