PowerShell terminal window: input is not properly processed as PTY

[ForNeVeR]

Consider this script:

$xxx = Read-Host "foo" -AsSecureString

If you run it in an IDE terminal (or any terminal, for that matter) and type anything in response to "foo:" prompt, the input will be replaced by stars, like this:

.\file.ps1
foo: *******

But in the PowerShell terminal, it doesn't work properly as PTY: it first inputs the unmasked value, and then shows the stars, like this:

C:/Windows/System32/WindowsPowerShell/v1.0/powershell.exe -File T:/Temp/untitled1/file.ps1
foo:fdsfsad
 *******

This is strange and should not be so. Let's figure out why it happens, and what are we doing wrong (the last change there was done in scope of #90). Perhaps we need some another kind of execution console?