Refactor member and method names

b_asic/GUI/arrow.py

b_asic/GUI/drag_button.py

b_asic/GUI/main_window.py

b_asic/GUI/port_button.py

b_asic/GUI/precedence_graph_window.py

b_asic/GUI/properties_window.py

b_asic/GUI/select_sfg_window.py

b_asic/GUI/simulate_sfg_window.py

b_asic/GUI/simulation_worker.py

b_asic/GUI/util_dialogs.py

b_asic/gui_utils/about_window.py

b_asic/gui_utils/decorators.py

b_asic/gui_utils/plot_window.py

b_asic/scheduler_gui/main_window.py

b_asic/scheduler_gui/scheduler_item.py

b_asic/scheduler_gui/timeline_item.py

b_asic/simulation.py

docs_sphinx/GUI.rst

test/test_gui.py

test/test_simulation_gui.py