disable copying link when password not completed

[ericawright]

select require password, the link and "copy" button get half opacity, and the button is disabled. When the checkbox is deselected or password is submitted the opacity is restored, and button is enabled.

result:

Fixes: #606.
Fixes: #600.
Related: #587.

[ericawright]

@clouserw can you find me a reviewer for this please?

[ghost]

@fzzzy has volunteered. thanks!

[fzzzy]

This looks good. I'd like to figure out how to build and test this locally so I can just verify it does what I think it does.

[fzzzy]

This works well, but I did notice one tiny bug. I think it is mostly a nit.

To reproduce, click the copy button, then click the password checkbox while the green checkmark is still visible in the copy button. The copy button will be rendered as faded out, but it will not be disabled and the user will be able to click it to copy the url again.

I think this is because after the await delay(2000), copyBtn.disabled = false; is being executed even if the password checkbox is now checked. This is a weird corner case and it is probably fine if it doesn't get fixed.

[fzzzy]

Approved, with the nit mentioned in #608 (comment). If it is too inconvenient to fix at the moment, just open a new issue to document the steps to reproduce. It is a quite harmless bug.

[ericawright]

nit has been fixed, thanks @fzzzy