open in merge editor prompt appears for notebook cells, but is noop

[amunger]

Type: Bug

1. creat a git conflict in the input for a notebook cell
2. open the notebook
   🐛 open in merge editor button appears, but doesn't do anything

VS Code version: Code - Insiders 1.72.0-insider (b3546b4, 2022-09-14T09:01:52.580Z)
OS version: Windows_NT x64 10.0.22621
Modes:
Sandboxed: Yes

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-1065G7 CPU @ 1.30GHz (8 x 1498)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_renderer: enabled_on video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: disabled_off
Load (avg)	undefined
Memory (System)	31.59GB (14.83GB free)
Process Argv	--crash-reporter-id 1202dc88-403d-4ebc-8393-af3551a8bd5b
Screen Reader	no
VM	0%

Extensions (30)

Extension	Author (truncated)	Version
Bookmarks	ale	13.3.1
tsl-problem-matcher	amo	0.6.2
wwbd	bre	2022.1.0
vscode-eslint	dba	2.2.6
python-environment-manager	don	1.0.4
gitlens-insiders	eam	2022.9.1305
EditorConfig	Edi	0.16.4
prettier-vscode	esb	9.8.0
copilot	Git	1.44.6735
vscode-pull-request-github	Git	0.51.2022091309
vscode-test-explorer	hbe	2.21.1
svg	joc	1.4.19
prettify-json	moh	0.0.3
vscode-language-pack-de	MS-	1.71.9140925
vscode-dotnet-runtime	ms-	1.5.0
python	ms-	2022.15.12571012
vscode-pylance	ms-	2022.9.10
data-wrangler	ms-	0.0.461
jupyter	ms-	2022.9.1002591055
jupyter-keymap	ms-	1.0.0
jupyter-renderers	ms-	1.0.9
remote-containers	ms-	0.252.0
remote-ssh	ms-	0.87.2022090715
remote-wsl	ms-	0.66.3
js-debug-nightly	ms-	2022.9.717
remote-explorer	ms-	0.1.2022091309
test-adapter-converter	ms-	0.1.6
vscode-github-issue-notebooks	ms-	0.0.119
vscode-js-profile-flame	ms-	1.0.4
vscode-yaml	red	1.10.1

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vscod805cf:30301675
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cppdebug:30492333
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[amunger]