Bugfix: Node connections stopped working.

As of commit d09c53bbeae43504718f866b26a526a26c2618a6 the drag and drop node connection stopped to work.
This was a concurrency issue, a wonder it worked in the first place.
Descendants of EffectViewController were accessing effects property in awakeFromNib which was set AFTER using the initializer it in InspectorEffectControl. Due to a draw call awakefromnib was delayed and the setter was used before the initializer of EffectViewController was executed.
Solution: Custom initializer accepting the effect value.