Make scheduler GUI use y-location

Closes #157 (closed)

Now, the schedule GUI uses the provided order.

Although it cannot be changed yet, all the drawing is based on the y-location now, so first step can be closed.

b_asic/scheduler_gui/operation_item.py

@@ -48,7 +48,7 @@ class OperationItem(QGraphicsItemGroup):
     def __init__(
         self,
         operation: Operation,
-        height: float = 0.75,
+        height: float = 1.0,
         parent: Optional[QGraphicsItem] = None,
     ):
         """