The problem of using .js-ci-variable-input-value is that,
whenever the value is hidden, then this selector won't be set,
instead, .js-secret-value-placeholder would be set.

If we just fill the value, the value is revealed. But if
we visit this later, the values were be hidden. This means
we don't have a consistent way to count the values.

Adding an unique qa selector to both revealed and hidden
values would make it easier to track the values.

To make it look more consistent, let's also do the same
for the key.