Place Windows Maximised overruled by git gui

[Phill]

A regression similar to #1123984 has appeared since the upgrade to 14.04.

Although the first window where you select the repository always ignored the window placement settings, the main window after opening a repository did work properly, now it does not and worse it is full-screen sized but not maximised meaning you can't see it all.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: git-gui 1:1.9.1-1
ProcVersionSignature: Ubuntu 3.13.0-26.48-generic 3.13.11
Uname: Linux 3.13.0-26-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CurrentDesktop: Unity
Date: Mon May 12 11:44:05 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-05-07 (369 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: git
UpgradeStatus: Upgraded to trusty on 2014-04-28 (13 days ago)