Add "Show password" in passphrase dialogue

[ericcornelissen]

Description

Feature suggestion to add a "Show password" icon to the input in the passphrase dialogue. Below I made a quick and ugly preview, but from that it should be clear what the feature would look like.

If there's people interested in this I would love to create a PR for it 😃

Steps to Reproduce

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Versions

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Additional Information

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[ericcornelissen]

This can be closed now #1808 is merged