Notebook: Change last cell kind scrolls the editor to top

[rebornix]

Issue Type: Bug

• Create multiple cells in a notebook, make sure that the height of the document is larger than the viewport
• Scroll the last cell to the center of the viewport (make sure that the first cell is invisible)
• Add a new code cell below
• Escape to move the focus to the cell container
• Press 'm' to conver it to code cell

The cell should be converted to a code cell but currently the editor scrolls to the very top (scrollTop = 0).

VS Code version: Code - Insiders 1.44.0-insider (6cf3dd9, 2020-03-27T05:28:16.333Z)
OS version: Darwin x64 19.2.0

System Info

Item	Value
CPUs	Intel(R) Core(TM) i9-9980HK CPU @ 2.40GHz (16 x 2400)
GPU Status	2d_canvas: enabled flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled metal: disabled_off multiple_raster_threads: enabled_on oop_rasterization: disabled_off protected_video_decode: unavailable_off rasterization: enabled skia_renderer: disabled_off_ok video_decode: enabled viz_display_compositor: enabled_on viz_hit_test_surface_layer: disabled_off_ok webgl: enabled webgl2: enabled
Load (avg)	2, 2, 2
Memory (System)	32.00GB (0.73GB free)
Process Argv	-psn_0_1335622
Screen Reader	no
VM	0%

Extensions (15)

Extension	Author (truncated)	Version
comment-tagged-templates	bie	0.3.0
github-markdown-preview	bie	0.0.2
markdown-emoji	bie	0.0.9
markdown-preview-github-styles	bie	0.1.6
gitlens	eam	10.2.1
vscode-pull-request-github-insiders	Git	2020.3.35461
vscode-language-pack-zh-hans	MS-	1.44.0
remote-ssh-edit-nightly	ms-	2020.3.38340
remote-ssh-nightly	ms-	2020.3.38340
js-debug-nightly	ms-	2020.3.1617
vsliveshare	ms-	1.0.1847
debugger-for-chrome	msj	4.12.6
kuskus-extensions-pack	ros	1.0.1
kuskus-kusto-language-server	ros	1.0.1
kuskus-kusto-syntax-highlighting	ros	1.1.8

(4 theme extensions excluded)

[alexr00]

Press 'm' to conver it to code cell
I don't see anything happen when I press m at this point. Nothing is converted into anything. However, it also doesn't scroll to the top.