Text Not scrolling in multi-line edit select

[bkercher]

Issue Type: Bug

1. Start with text file - say 100 lines long
2. Go to line 50
3. Use alt shift up or down arrow to select multiple lines - 2 or more
4. use up/down arrow to move mult-line selected region

Expected result

1. Page scrolls to keep multi-line select region in display area.
2. Multi-line select region is maintained when scrolling to ends of document

Actual result

1. No text scrolling occurs and multi-line cursor region disappears off the page.
2. Multi-line select region exits when cursor reaches end of document and page scroll jumps to the location.

VS Code version: Code 1.41.1 (26076a4, 2019-12-18T14:58:56.166Z)
OS version: Windows_NT x64 10.0.18363

System Info

Item	Value
CPUs	Intel(R) Core(TM) i5-3450 CPU @ 3.10GHz (4 x 3093)
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: unavailable_off skia_renderer: disabled_off surface_control: disabled_off surface_synchronization: enabled_on video_decode: enabled viz_display_compositor: enabled_on viz_hit_test_surface_layer: disabled_off webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	15.96GB (9.17GB free)
Process Argv
Screen Reader	no
VM	0%

Extensions (37)

Extension	Author (truncated)	Version
Bookmarks	ale	11.0.0
project-manager	ale	10.10.0
vbscript-language-server-client	and	1.0.3
code-gnu-global	aus	0.2.2
vscode-custom-css	be5	3.0.9
plsql	cas	0.0.5
vbscript	Dar	1.0.4
vscode-markdownlint	Dav	0.34.0
vscode-eslint	dba	2.1.1
xml	Dot	2.5.0
tslint	eg2	1.0.44
vscode-firefox-debug	fir	2.6.1
code-runner	for	0.9.16
CppSnippets	har	0.0.14
beautify	Hoo	1.5.0
classic-asp	ili	0.0.4
classic-asp-html	jtj	0.1.2
docomment	k--	0.1.8
vbscript	kar	0.5.5
vscode-clangd	llv	0.0.20
vscode-JS-CSS-HTML-formatter	lon	0.2.3
VBScript	lug	0.0.2
add-to-globals	Min	1.0.2
vscode-clang	mit	0.2.3
vscode-docker	ms-	0.10.0
python	ms-	2020.2.64397
azure-account	ms-	0.8.8
cpptools	ms-	0.26.3
csharp	ms-	1.21.12
notepadplusplus-keybindings	ms-	1.0.5
powershell	ms-	2020.1.0
vs-keybindings	ms-	0.2.0
html5-boilerplate	sid	1.0.3
vscode-hexdump	sle	1.7.2
vscode-terminal-here	Tyr	0.2.4
vs-asp-classic	wfe	0.0.4
markdown-all-in-one	yzh	2.7.0

[alexdima]

Duplicate of #6995