Improve view initialization #42
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Currently, when you initialize an event generator from a UIView, it adds that view directly to a UIWindow. This can be a destructive change because the view might already be a subview of another view (possibly even already added to a window) and it will get removed.
This change detects if the view already has a window and uses that directly. If not, it will get the top level superview by transversing the view hierarchy and use that instead. Because we set the
mainViewto the view that was passed in the initializer, everything else remains the same and it should not be a breaking change.NOTE: This is possibly a breaking change for some cases where the view was getting removed from its original superview. This should be very rare and should have been considered a bug in the first place.