clearsightstudio/ProMotion — pull request #178 by toshiwo (2013-06-28 18:49:46+00:00)
Title: change open_screen return a screen

I came up with this idea when I was using modal view.

before:
```ruby
def action_open_modal
@modal_screen = ModalScreen.new
open @modal_screen, moda: true
end
```

after:
```ruby
def action_open_modal
@modal_screen = open ModalScreen, moda: true
end
```