Constrain windows to the visible portion of the screen
## Submitted by Michael Orlitzky
Assigned to **Olivier Fourdan `@olivier`**
**[Link to original bug (#7550)](https://bugzilla.xfce.org/show_bug.cgi?id=7550)**
## Description
Originally discussed on the mailing list:
http://foo-projects.org/pipermail/xfce/2011-April/028605.html
I'm attaching a patch that adds a checkbox to the tweaks/placement dialog. Enabling it switches on the patch that Olivier posted to the mailing list.
(Disclaimer: most of what I changed was cargo-cult copying. It seems to work, though.)
Version: 4.8.0
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