When the layer is being renamed clicking away doesn't exit the field.

Repro:
1. Select a layer and try to rename it, click away - on the canvas of the Animator Window. The layer name is still being in edit mode, still in focus.
2. Try to add a State - it's possible, but the layer name is still being in edit mode
3. Try to add transition - it's impossible and the layer name is still in the edit mode
4. Clicking on the Animator canvas should exit the edit mode of layer's name.