Custom titlebar menu opens on click

[PeterWone]

Issue Type: Bug

Currently, the top level menu in the custom titlebar opens a submenu in response to a click event.

Correct behaviour under Windows is to open a submenu in response to a mousedown event. Compare the native top level menu, which opens submenus on a mousedown event.

Note that this implies that menu item invocation should triggered by mouseup rather than click, which is also not currently correctly implemented.

Version: 1.27.0-insider
Commit: 0779618
Date: 2018-08-21T08:48:57.835Z
Electron: 2.0.7
Chrome: 61.0.3163.100
Node.js: 8.9.3
V8: 6.1.534.41
Architecture: x64

VS Code version: Code - Insiders 1.27.0-insider (0779618, 2018-08-21T08:48:57.835Z)
OS version: Windows_NT x64 10.0.17134

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz (8 x 2112)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: disabled_software rasterization: enabled video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled
Memory (System)	15.93GB (9.93GB free)
Process Argv	C:\Users\PeterWone\AppData\Local\Programs\Microsoft VS Code Insiders\Code - Insiders.exe
Screen Reader	no
VM	0%

Extensions (2)

Extension	Author (truncated)	Version
mssql	ms-	1.4.0
csharp	ms-	1.15.2

[sbatten]

duplicate of #52907