Hide the cursor when the password prompt is showing

[stefanhaller]

The cursor is a bit of a security concern, because it reveals the length (and typing pattern) of the password.

Resolves #4877.

[codacy-production]

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Coverage variation	Diff coverage
Report missing for 6941b811	✅ 100.00%

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	Coverable lines	Covered lines	Coverage
Common ancestor commit (6941b81)	Report Missing	Report Missing	Report Missing
Head commit (851afe9)	57739	50195	86.93%

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	Coverable lines	Covered lines	Diff coverage
Pull request (#4878)	1	1	100.00%

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[heysokam]

Would it be possible for the behavior to be a configurable option?
While it is a security concern in certain situations, I can see the usefulness of seeing where your cursor lies while typing in regular situations.
So I can imagine this being a non-issue for most people.

Maybe having a configuration option could be the best of both worlds? 🤔

[stefanhaller]

I don't think that's necessary. While it might seem strange at first that you don't get any visual feedback that you are typing something, that's the point after all. And if you get a password prompt on the console, you don't see anything either. I think that's ok.