Closes #40678

The python file below simulates the macros at various timings and can be
run by running:
1. `sudo python3 -m pip install evdev --break-system-packages`
2. `sudo python3 zed_shift_brace_replayer.py`

Checked timings for hold=0.1, =0.01 and =0.001 with the latter two no
longer causing incorrect inputs.



[zed_shift_brace_replayer.py](https://github.com/user-attachments/files/23560570/zed_shift_brace_replayer.py)

Release Notes:

- linux: fixed a race condition where the macros containing modifier +
key would sometimes be processed without the modifier