The initial Slint problem was larger than thought. Hopefully a more universal fix.

internal/platform/xorg/commands_native.h

@@ -27,6 +27,7 @@ typedef struct {
 typedef struct { int pressed, code, symbol, textSymbol, modifiers, locks; unsigned long timestamp; char text[64]; } CommandKey;
 typedef struct {
     int known, pid, x, y, width, height, outerX, outerY, outerWidth, outerHeight;
+    int frameX, frameY, frameWidth, frameHeight;
     unsigned long window;
 } Foreground;
 typedef struct { int known, pid, x, y; unsigned long window; } PointerPosition;