metomi/rose — pull request #736 by benfitzpatrick (2013-06-10 15:30:12+00:00)
Title: rose edit: fix capture middle click paste

This fixes a failure to capture a middle click paste event in the `gtk.Entry` widgets in rose edit.

@matthewrmshin, please review.

The change can be tested by opening an app that looks like this:
```
[env]
A=foo
```

selecting some text from a browser, terminal, or text editor, and middle click pasting it into the value widget for env=A. In the old code, no modification was noticed.