hide password in Server connection dialog

[okworx]

The password is being displayed as clear text in the dialog; instead, it should be obfuscated for security reasons.

[msrocka]

@okworx I changed this in the connection editor:

Are there other places where this should be fixed? Also note, that the password is still saved as plain text in the stored connections in the user folder ~/.epd-editor/connections/*.json. But as only the user should have access there it is maybe ok? (I mean for the epd-editor...)

[okworx]

That sounds reasonable to me! 👍