fix blueprint id generation overwriting old blueprints if any were removed before

src/blueprint.rs

@@ -27,6 +27,10 @@ impl Blueprint {
 		}
 	}
 
+	pub fn id(&self)->&String{
+		&self.id
+	}
+
 	pub fn convert_board(&mut self) -> &Board {
 		if self.tile_board.is_none() {
 			self.tile_board = Some(Board::parse(&self.board));

src/editor.rs

@@ -280,7 +280,17 @@ impl Editor {
 			}
 		}
 		board.trim_size(0);
-		let mut blueprint = Blueprint::new(&board, self.blueprints.len());
+		let mut id = 0;
+		'outer: loop {
+			for b in &self.blueprints {
+				if b.id() == &format!("blueprint_{id}") {
+					id += 1;
+					continue 'outer;
+				}
+			}
+			break;
+		}
+		let mut blueprint = Blueprint::new(&board, id);
 		if !self.new_blueprint_name.is_empty() {
 			blueprint.name = self.new_blueprint_name.clone();
 		}