Before this commit, the push to talk key was not correctly
captured. Indeed, Alt/Control/Shift/Meta was condifered
twice when present, resulting in an incorrect HotKey registration.

Steps to reproduce:
- Go a discuss channel
- Access the call setting menu
- Try to set your push to talk key to "Ctrl + Alt"
- The HotKey is incorrect ("Ctrl + Alt + Alt").

task-3058665

closes odoo/odoo#134422

X-original-commit: 04683033190acc55ee338217367e31494b070bcc
Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>