disable save in a scene

Even with the sophisticated save-functions, sometimes you would prefer to just not allow saving a game because

• of the gameplay
• the passage has script variables involved that store data outside window.story.state
• there are dynamicly mapped event-handlers or functions that would be very hard to reconstruct on game-load

Therefore you can add the tag [_nosave] to a passage. This will disable the save buttons in the save-dialog until you get into a passage that doesnt have this tag.
Instead you could also set window.story.state._gm.nosave = true before (!) the save-dialog gets rendered.