Popups are hidden by onboard

When a popup shows me some buttons, like 'ok' or 'cancel', the buttons are mostly hidden by the keyboard.
Popup windows are placed in the middle of the screen. It would me smarter by the window manager when new windows, especially popups are placed around overlays like onboard.

This shold be fixed in the window managers.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: onboard 0.99.0~alpha1~tr1190-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-9.18-generic 3.8.1
Uname: Linux 3.8.0-9-generic i686
ApportVersion: 2.9-0ubuntu2
Architecture: i386
Date: Mon Mar 4 18:15:34 2013
InstallationDate: Installed on 2013-02-08 (24 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.2)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: onboard
UpgradeStatus: No upgrade log present (probably fresh install)