Focus selected node in scene tree

![](http://oi62.tinypic.com/jkf0ja.jpg)
Sometimes you know you have selected something, but just can't find it in scene tree

![](http://oi62.tinypic.com/28wl0so.jpg)
new "focus" button

![](http://oi62.tinypic.com/2lk78tu.jpg)
Click to focus on selected item

![]http://oi60.tinypic.com/6hnhqe.jpg)
And if it's collapsed

![]http://oi57.tinypic.com/i1wj6e.jpg)
It'll be expanded for you

It also fixed #428 "in help tab node tree moving away when clicking"