Kitty Keyboard encoding has incorrect modifier bits for modifier keys

[rockorager]

When using kitty keyboard protocol encoding, Ghostty incorrectly sets the modifier bits. Per the specification:

When the key event is related to an actual modifier key, the corresponding modifier’s bit must be set to the modifier state including the effect for the current event.

I tested this on Alacritty, Foot, Kitty, and Ghostty. All except Ghostty have the same encoding for this keypress.

I suspect this is only on a GTK build under Wayland, due to how Wayland delivers modifier presses + modifier events.

Repro Steps

1. kitten show_key -m kitty
2. Press control

Expected Output

CSI 57442 ; 5 u (press)

CSI 57442; 1 : 3 u (release)

Actual Output

CSI 57442 u (press)

CSI 57442 ; 5 : 3 u (release)

Reference: kovidgoyal/kitty#6913 (comment)