Suspending helix leaves state in terminal

[rcorre]

Summary

When I suspend helix with ctrl+z, it leaves a bunch of UI elements in the terminal, such as line numbers and sometimes the bottom-right keyhint dialog. I also see control sequences like ^[[?6c.
ctrl+z also takes several seconds to exit the application, and fg takes several seconds to restore.

Reproduction Steps

I tried this:

1. hx
2. ctrl+z

I expected this to happen:

I see what what previously in my terminal

Instead, this happened:

[rco3re@midgar agos]$ fg
hx s2enes/Spell.gd
    1        (             )
   12   
[1]+  Stopped                 hx scenes/Spell.gd
[rcorre@midgar agos]$ 
    3
    4
    5
    6
    7
    8
    9
    0
    1
    2
    3
    4
    5
    6
    7
    8
   19
    0

Helix log

~/.cache/helix/helix.log

please provide a copy of `~/.cache/helix/helix.log` here if possible, you may need to redact some of the lines

[helix.log](https://github.com/helix-editor/helix/files/10867014/helix.log)

Platform

Linux

Terminal Emulator

st 0.8.5

Helix Version

22.12-313-gac75cdec (bad)
22.12-294-g6494fc1d (good)

[rcorre]

The culprit appears to be a066815 Enable the enhanced keyboard protocol if supported

[the-mikedavis]

Duplicate of #6149