Support touch scrolling

[wmertens]

Issue Type: Bug

On Linux+Wayland at least, touch can only be used to place the cursor somewhere, but you can't scroll the pane, and you can't even select (which is what I would expect if scroll wasn't working)

On top of that, if you touch an identifier, it will sometimes jump to the definition of that identifier, which is never what I want.

I like using touch to scroll, and VS Code is the only Electron app I use that has problems with this. For example, the Microsoft Teams desktop app supports touch just fine.

VS Code version: Code 1.47.3 (91899dc, 2020-07-23T15:51:39.791Z)
OS version: Linux x64 5.7.14

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-1065G7 CPU @ 1.30GHz (8 x 2958)
GPU Status	2d_canvas: enabled flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: disabled_off protected_video_decode: unavailable_off rasterization: disabled_software skia_renderer: disabled_off_ok video_decode: unavailable_off viz_display_compositor: enabled_on viz_hit_test_surface_layer: disabled_off_ok webgl: enabled webgl2: enabled
Load (avg)	1, 1, 1
Memory (System)	15.21GB (2.92GB free)
Process Argv	--no-sandbox
Screen Reader	no
VM	0%
DESKTOP_SESSION	gnome
XDG_CURRENT_DESKTOP	GNOME
XDG_SESSION_DESKTOP	gnome
XDG_SESSION_TYPE	wayland

Extensions (64)

Extension	Author (truncated)	Version
typingspeed	alb	0.0.2
vscode-sqlite	ale	0.8.2
Nix	bbe	1.0.1
nixfmt-vscode	bre	0.0.1
npm-intellisense	chr	1.3.0
vscode-css-modules	cli	0.2.3
gitignore	cod	0.6.0
systemd-unit-file	coo	1.0.6
vscode-markdownlint	Dav	0.36.2
vscode-eslint	dba	2.1.8
vscode-quick-select	dba	0.2.8
vscode-npm-source	dku	1.0.0
xml	Dot	2.5.1
gitlens	eam	10.2.2
EditorConfig	Edi	0.15.1
vscode-npm-script	eg2	0.3.13
prettier-vscode	esb	5.1.3
vscode-highlight	fab	1.4.1
vscode-todo-plus	fab	4.17.1
flow-for-vscode	flo	1.5.0
backticks	fra	1.6.0
vscode-php-cs-fixer	fte	0.3.0
vscode-pull-request-github	Git	0.18.0
vscode-test-explorer	hbe	2.19.1
svgeditor	hen	2.9.0
vscode-ungit	Hir	2.2.3
vscode-power-mode	hoo	2.2.0
vscode-graphviz	joa	0.0.6
svg	joc	1.3.8
docthis	joe	0.7.1
vscode-peacock	joh	3.8.0
vscode-styled-components	jpo	0.0.29
chat	kar	0.35.0
vscode-jest-test-adapter	kav	0.6.2
rainbow-csv	mec	1.7.1
git-graph	mhu	1.25.0
vscode-apache	mrm	1.2.0
vscode-docker	ms-	1.4.1
python	ms-	2020.7.96456
remote-containers	ms-	0.128.0
remote-ssh	ms-	0.51.0
remote-ssh-edit	ms-	0.51.0
remote-wsl	ms-	0.44.4
vscode-remote-extensionpack	ms-	0.20.0
hexeditor	ms-	1.2.1
js-debug-companion	ms-	1.0.2
js-debug-nightly	ms-	2020.8.1017
vsliveshare	ms-	1.0.2478
vsliveshare-audio	ms-	0.1.85
vsliveshare-pack	ms-	0.4.0
color-highlight	nau	2.3.0
vscode-jest	Ort	3.2.0
code-settings-sync	Sha	3.4.3
markdown-preview-enhanced	shd	0.5.12
indenticator	Sir	0.6.0
vscode-fileutils	sle	3.0.1
vscode-hexdump	sle	1.7.2
addDocComments	ste	0.0.8
json2yaml	tux	0.2.0
es-quotes	vil	0.2.6
babelrc	wad	1.0.0
change-case	wma	1.0.0
JavaScriptSnippets	xab	1.8.0
ReactSnippets	xab	2.4.0

(18 theme extensions excluded)

[personalizedrefrigerator]

Touch scrolling works fine (for me) in GNOME/X11 and KDE Plasma/X11, but not Plasma/Wayland or GNOME/Wayland.

[kaofishy]

Any progress on this? I can enable touch gestures on Wayland by passing --touch-events argument to underlying Electron but it would be nice if this was the default.