Windows switch to workspace below when maximizing them on the bottom half of the screen

[Nicolás Satragno]

Steps to reproduce:

0) Have multiple workspaces enabled.
1) Open a window.
2) Move window to lower half of the screen.
3) Maximize the window.

Expected behaviour:

The window maximizes on the current workspace.

Actual behaviour:

The window moves to the workspace below (if any) and maximizes there.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: unity 7.4.0+16.04.20160906-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-53.74-generic 4.4.30
Uname: Linux 4.4.0-53-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2.2
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Sun Dec 11 12:36:47 2016
DistUpgraded: 2016-05-24 15:48:30,539 DEBUG icon theme changed, re-reading
DistroCodename: xenial
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: Micro-Star International Co., Ltd. [MSI] 4th Gen Core Processor Integrated Graphics Controller [1462:1106]
 NVIDIA Corporation GK104M [GeForce GTX 870M] [10de:1199] (rev ff) (prog-if ff)
InstallationDate: Installed on 2015-04-25 (595 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
MachineType: Micro-Star International Co., Ltd. GT70 2PC
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-53-generic.efi.signed root=UUID=8a80ef71-0ca0-4f2c-b90e-631e17474e7a ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: Upgraded to xenial on 2016-05-24 (200 days ago)
dmi.bios.date: 05/02/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: E1763IMS.50W
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: MS-1763
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: REV:0.C
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Micro-Star International
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrE1763IMS.50W:bd05/02/2014:svnMicro-StarInternationalCo.,Ltd.:pnGT702PC:pvrREV0.C:rvnMicro-StarInternationalCo.,Ltd.:rnMS-1763:rvrREV0.C:cvnMicro-StarInternational:ct10:cvrN/A:
dmi.product.name: GT70 2PC
dmi.product.version: REV:0.C
dmi.sys.vendor: Micro-Star International Co., Ltd.
version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2.2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2.2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1.2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
xserver.bootTime: Sun Dec 11 12:19:19 2016
xserver.configfile: default
xserver.errors: open /dev/dri/card0: No such file or directory
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 5920
 vendor CMO
xserver.version: 2:1.18.4-0ubuntu0.2