Unity is not always respecting key map

[Martin Račák]

How to reproduce:

1. Swap Esc and Caps Lock either in gnome-tweak-tool or running "setxkbmap -option caps:swapescape".
2. Press and hold Atl + Tab (application overview is displayed).
3. Press Caps Lock key (remapped to Esc now).

Expected behavior: Cancel the Alt + Tab application overview without switching to any window.
Actual behavior: Window overview stays open. However, pressing Esc cancels the application overview without switching to any window as if it wasn't remapped, but Caps Lock is toggled.

Analogous behavior in window spread view - Super + W, possibly elsewhere. Workaround: https://github.com/oblitum/caps2esc

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: unity 7.4.0+16.04.20160906-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-57.78-generic 4.4.35
Uname: Linux 4.4.0-57-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2.4
Architecture: amd64
BootLog:

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: Thu Dec 29 16:33:37 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
EcryptfsInUse: Yes
GraphicsCard:
 Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:5008]
InstallationDate: Installed on 2016-10-20 (69 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: LENOVO 3358BBG
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-57-generic root=UUID=3c3dcb4b-87ab-4b14-8b49-b63aed15ca51 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/18/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: H4ET92WW (2.52 )
dmi.board.asset.tag: Not Available
dmi.board.name: 3358BBG
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrH4ET92WW(2.52):bd04/18/2013:svnLENOVO:pn3358BBG:pvrThinkPadEdgeE130:rvnLENOVO:rn3358BBG:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 3358BBG
dmi.product.version: ThinkPad Edge E130
dmi.sys.vendor: LENOVO
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: Thu Dec 29 07:06:53 2016
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 4376
 vendor CMN
xserver.version: 2:1.18.4-0ubuntu0.2