I'm trying to remove the saved passwords from the spark.properties files on all of our systems.
Using version 2.7.3 build 715, I've been able to modify the default.properties file in the jar and set HIDE_SAVE_PASSWORD = true (thanks to issue SPARK-1640). This does what it's supposed to do and hides the 'save password' button. However, if you are to type in your username, password, and server, and check the 'Auto Login' box, it will essentially do the same thing... it saves the password and auto logs in.
To make this work in practice, I think we'll need an additional option to also hide the auto login option.