vscode: Cannot toggle windows on Mac

Issue Type: Bug

Normally on MacOS, you can toggle between two windows of the same app with ⌘ + ` (Cmd + backtick). I have verified that this works in other apps installed on my machine (eg Chrome). This used to work in VS Code, but has stopped working very recently (within the last few days). I’ve checked my keyboard mapping, and the only commands involving a backtick use Ctrl (not Cmd). I’ve also tried this with all extensions disabled.

To reproduce:

1. Open VS Code
2. Open a second VS Code Window (Cmd + Shift + N)
3. Try to toggle using Cmd + Backtick
4. I now expect to be in the first window I opened, but I’m not

VS Code version: Code 1.31.0 (7c66f58312b48ed8ca4e387ebd9ffe9605332caa, 2019-02-05T22:32:14.164Z) OS version: Darwin x64 17.7.0

System Info

Item	Value
CPUs	Intel® Core™ i7-7700K CPU @ 4.20GHz (8 x 4201)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: enabled rasterization: unavailable_off surface_synchronization: enabled_on video_decode: enabled webgl: enabled webgl2: enabled
Load (avg)	3, 2, 2
Memory (System)	16.00GB (1.21GB free)
Process Argv
Screen Reader	no
VM	0%

Extensions (29)

Extension	Author (truncated)	Version
color-info	bie	0.5.0
path-intellisense	chr	1.4.2
vscode-eslint	dba	1.8.0
javascript-ejs-support	Dig	0.4.1
githistory	don	0.4.6
gitlens	eam	9.5.0
tslint	eg2	1.0.42
vsc-material-theme	Equ	2.6.3
auto-close-tag	for	0.5.6
auto-rename-tag	for	0.0.15
macros	ged	1.2.1
latex-workshop	Jam	5.21.0
intellij-idea-keybindings	k–	0.2.31
wordcounter	kir	1.4.0
rainbow-csv	mec	1.0.0
dotenv	mik	1.0.1
python	ms-	2019.1.0
vscode-jest	Ort	2.9.2
vscode-docker	Pet	0.5.2
livescript	pse	0.1.1
gitlink	qez	0.4.5
ruby	reb	0.21.0
code-settings-sync	Sha	3.2.4
vscode-zipexplorer	sle	0.3.1
autoimport	ste	1.5.3
rewrap	stk	1.9.1
code-spell-checker	str	1.6.10
vscode-todo-highlight	way	1.0.4
markdown-all-in-one	yzh	2.0.1