I have forgotten SSH password from Remote Server, but it is saved in IDE (PhpStorm 2017.1) in hidden way:
Is there any way to view hidden password?
I finally could retrieve password from PhpStorm 2017.1:
Go to Settings/Preferences | Appearance & Behavior | System Settings | Passwords, enter new master password and save.
Open /.PhpStorm2017.1/config/c.kdbx (in "Keepass 2" or "Keeweb") with saved master password.
Here it is!
Thanks to @LazyOne