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<!-- Describe the issue -->
<!--- What behavior did you expect? -->
Everything after command which requires private key or passphrase is hidden in input field, like in submitted command.
<!--- What was the actual behavior (provide screenshots if the issue is GUI-related)? -->
Input is not hidden.
<!--- How reliably can you reproduce the issue, what are the steps to do so? -->
Enter walletpassphrase and some data after it, for example.
<!-- What version of Bitcoin Core are you using, where did you get it (website, self-compiled, etc)? -->
0.17.0.1, website.
<!-- What type of machine are you observing the error on (OS/CPU and disk type)? -->
GNU/Linux, x86_64, HDD
<!-- Any extra information that might be useful in the debugging process. -->
<!--- This is normally the contents of a `debug.log` or `config.log` file. Raw text or a link to a pastebin type site are preferred. -->
