Replace Gtk.Box and Gtk.EventBox direct __init__() calls with super()

[Dakshsharma1108]

Replace Gtk.Box/EventBox init() calls with super()

Replace direct parent class __init__() calls with super().__init__()
for Gtk.Box and Gtk.EventBox . Pure code style refactor.

Example:

# Before
Gtk.Box.__init__(self, orientation=Gtk.Orientation.VERTICAL)
Gtk.EventBox.__init__(self)

# After
super().__init__(orientation=Gtk.Orientation.VERTICAL)
super().__init__()