Fix documentation for scheduler GUI

b_asic/scheduler_gui/axes_item.py

b_asic/scheduler_gui/compile.py

b_asic/scheduler_gui/logger.py

b_asic/scheduler_gui/main_window.py

b_asic/scheduler_gui/operation_item.py

b_asic/scheduler_gui/scheduler_event.py

b_asic/scheduler_gui/scheduler_item.py

b_asic/scheduler_gui/signal_item.py

b_asic/scheduler_gui/timeline_item.py