Pressing Insert keyboard button does not trigger overwrite mode

[BraveNewMath]

• VSCode Version: Code 1.13.1 (379d2ef, 2017-06-14T18:21:47.485Z)
• OS Version: Windows_NT ia32 10.0.14393
• Extensions:

Extension	Author	Version
copy-syntax	atian25	0.5.1
npm-intellisense	christian-kohler	1.3.0
jshint	dbaeumer	0.10.15
vscode-npm-source	dkundel	1.0.0
javadebugger	donjayamanne	0.1.2
xml	DotJoshJohnson	1.9.2
LogFileHighlighter	emilast	1.1.1
vs-code-xml-format	fabianlauer	0.1.5
scriptcsRunner	filipw	0.1.0
knockoutjs	furstenberg	0.1.0
vscode-javac	georgewfraser	0.0.41
Ionide-fsharp	Ionide	2.27.8
vscode-omnisharp	jrieken	0.3.0
Go	lukehoban	0.6.62
vscode-todo-parser	minhthai	1.8.10
vscode-exec-node	miramac	0.5.0
vscode-elixir	mjmcloug	0.5.0
csharp	ms-vscode	1.11.0
mono-debug	ms-vscode	0.15.6
PowerShell	ms-vscode	1.4.1
debugger-for-chrome	msjsdiag	3.1.6
node-modules-resolve	naumovs	1.0.2
qub-msbuild	qub	0.6.3
qub-xml	qub	1.2.1
ClassyNaming	reflectiondm	1.1.0
git-common-commands-suite	samschneller	0.2.2
vscode-autohotkey	slevesque	0.2.1
jsx	TwentyChung	0.0.1

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Steps to Reproduce:

1. Click Insert key
2. Put curser to the left of existing text
3. Attempt to type over existing text adds text instead of overwriting

[BraveNewMath]

this is a duplicate of an existing issue #1012