+1 from me for this feature too.
But I like to add a little twist to it.
Instead of disabling "show" for the whole template, it will be awesome if we can hide certain part of process during the project execution.
Give us actions like "Hide" & "Unhide" or "Hide Tab" (or both even better
) in project maker.
So during project execution, the browser will become blank when it reach the "Hide" action and come back normal again when it reach the "Unhide" action.
In case of "Hide Tab", only tabs set to hide will not show in browser.
This way we still be able to let end user to see the project in action while hiding the process we want.