icon-naming-spec should include icons for "show password" and "hide password"
This report depends on xdg-specs#135 (closed) being resolved, i suppose.
Modern systems (including this gitlab instance) with classically blinded password fields tend to have a standardized icon that allows the user to bypass the password blinding.
It would be reasonable for standardized icon sets to include this pair of icons.
Here is an example showing the "show password" icon, which is often a representation of a human eye:
Here is an example showing the "hide password" icon, which is often a human eye with a slash through it: