pySUMOQt/MainWindow: Connect TextEditor Widget to various MainWindow elements.
pySUMOQt/MainWindow: Connect TextEditor Widget to various MainWindow
elements.

Connects the TextEditor to the StatusBar updater, the zoom in/out
actions, and the expand/collapse all button.

Conflicts:
	src/pySUMOQt/MainWindow.py

pySUMO/pysumo,pySUMO/pysumo