If you're not open to feature requests, feel free to ignore =)
- Spawn(Block|Thing|Item) Action. Similar UI to creating a Teleport Action where you pick the position, but also you pick the Block/Thing/Item to spawn. The whole Action sequence should maybe not run if the player is in that position and you're spawning Block-like things?
- Clear(Block|Thing|Item) Action (or maybe just a single ClearPosition). Pick a position when creating the Action and deletes whatever matching entity is there
- RemoveSelf Action. Kind of a special case of Clear(Block|Thing|Item), though it probably only makes sense for Things. I know there aren't any Actions that are only relevant to the type of entity they are attached, but you can already do Do Actions in a Row/Loop for Items which doesn't effectively do anything, so this isn't too different maybe?
