Allow to totally hide password in lockscreen

[tmarti2]

Pull Request

Motivation

It was suggested as a feature to be able to totally hide the password in lockscreen so that even its length could not be seen, in public for instance.

This MR replaces the toggle setting for circle/random with a combo which adds invisible as an option. It's not invisible icon per se, just that we do not draw anything. This MR replaces the other setting (and modifies I18n entries), so it will be reset to the default value (circle) for people that had random enabled.

Type of Change

Mark the relevant option with an "x".

• Bug fix
• New feature
• Breaking change
• Refactoring

Related Issue

• Closes Make password completely invisible when entering on lock screen #2285

Testing

Describe how you tested your changes and mark the relevant items.

• Tested on niri
• Tested on Hyprland
• Tested on sway
• Tested with different bar positions and density settings
• Tested at different interface scaling values
• Tested with multiple monitors (if applicable)

Checklist

• Code follows project style guidelines
• Self-reviewed my code
• No new warnings or errors
• Documentation or comments updated (if relevant)

[YsLtr]

Yeah, looks good. It doesn't show anything when typing in the password. Maybe we can remove the cursor notification (position indicator) when hidden too.

[tmarti2]

I wanted to do that, but without it you do not have any feedback at all that the password field is focused and that typing actually works (well, the "show password" icons appears but I don't feel it's enough)