[BUG] Not sending signal to selected process from signals dialog

[omnivagant]

From the signals dialog, btop seems to send chosen signal to other process than the one mentioned by PID and name in top of the signals dialog.

To Reproduce

1. Create some activity in a process so that it end up in the top of the process list
2. Select the process and open the signals dialog
3. Choose a signal and send it, 9 is easy to spot

Most often this has killed btop itself, my suspicion is that btop act on the current top process and not the one you thought you selected, whose PID and name is printed in the top of the signals dialog.

I have not been able to reproduce this when filtering processes.

Expected behavior

The signal should be sent to the process presented in the top of the signals dialog.

Info (please complete the following information):

• btop version: 1.2.13
• /usr/bin/btop: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-musl-x86_64.so.1, stripped
• Linux 6.1.55-1-lts Fix documentation of --utf-force in README and --help. #2-Alpine SMP PREEMPT_DYNAMIC Thu, 28 Sep 2023 12:30:10 +0000 x86_64