Allow resource properties to be marked as secret #5065
Description
Today, environment variables are shown in the UI as a series of dots (like a password mask) and the user must flip a toggle to show them. This prevents accidental disclosure to onlookers, such as when screen sharing.
We should add the same facility to resource properties, and allow each property to define whether it is a secret or not. Such secret properties would be displayed as masked in the UI by default.