Suggest adding -P (--password) to dialog mode for obscuring password/secret entries

[firecat53]

Similar to wofi -P, rofi -dmenu -password or bemenu -x. It replace text entry in the dialog box with either * or no visible entry, depending on the application.

This would be useful for projects like keepmenu and bitwarden-menu.

Wayland-compatible dmenu-style launchers are hard to find!

Thanks!