"Enabled" checkbox in bottom of view examples is broken

[Alex2772]

#304 The bottom "Enabled" checkbox disables all elements when unchecking it, but checking it again doesn't enables them back.

[Arcnor]

I think the issue is that the checkbox "checked" signal is disabling the events of the signal receiver as well (probably signals get disabled when the object itself is disabled?). Maybe signals should not be disabled in the first place, but this is a trickier bug than anticipated and probably not related to the example itself, so I'll defer to you :).