Incorrect behavior of AltGr+é/è in Terminal on AZERTY layout

[u1735067]

Does this issue occur when all extensions are disabled?: Yes

• VS Code Version: 1.56.2
• OS Version: Win 10 19042

Steps to Reproduce:

1. Enable NumLock (not able to reproduce without)
2. In the Terminal, type AltGr + é followed by space to obtain ~
3. Get é~ instead

I found that this is a dup of (all closed) #88156, #73876, #68262, #59438 (2018) and related to uptream xtermjs/xterm.js#2151 / xtermjs/xterm.js#2479, but as this bug is still affecting VSCode (no workaround included in VSCode to make it usable), shouldn't an issue be kept opened here? Maybe a known issues entry?

Please note that using an enhanced layout like https://s.twb.fr/mirror-kbdfrac/kbdfrac.htm (kbdfrac2.exe), with ´ on the & key, produces the same behavior (&´).

As workaround, we can:

• Disable NumLock
• Define a custom mapping as described in Scandinavian keyboard layout can't handle input tilde (~) xtermjs/xterm.js#2151 (comment) / https://superuser.com/questions/414405/pressing-the-tilde-key-waits-for-a-second-key-stroke-how-do-i-disable-this (but I guess this prevent writing ñ or È)

Hope you'll have time to fix this :) (and sorry if I only wasted your time)

[Tyriar]

We maintain the xterm.js repo so we track it over there to try keep the total issue count I need to manage down.