Provide stronger visual indication that extension installation was successful

[weinand]

Issue Type: Bug

Testing #67263:

After installing a new extension (e.g. "Azure Account"), I'm now missing some indication that the installation was successful. Previously a "Reload Window" was required. Now there is no Reload and the only visible UI change is the tiny "Install" button turning into an "Uninstall" button.
It would help if the Extension viewlet would automatically show the "installed Extensions" after an Install.

VS Code version: Code - Insiders 1.31.0-insider (acc7365, 2019-01-29T06:14:22.700Z)
OS version: Linux x64 4.15.0-44-generic

System Info

Item	Value
CPUs	Intel(R) Core(TM) i9-8950HK CPU @ 2.90GHz (4 x 2904)
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: disabled_software surface_synchronization: enabled_on video_decode: unavailable_off webgl: enabled webgl2: enabled
Load (avg)	1, 1, 1
Memory (System)	5.89GB (3.16GB free)
Process Argv	--unity-launch
Screen Reader	no
VM	100%

Extensions (2)

Extension	Author (truncated)	Version
azure-account	ms-	0.8.0
vscode-typescript-tslint-plugin	ms-	0.4.0

[sandy081]

Duplicate of #66931

[vscodebot]

Thanks for creating this issue! We figured it's covering the same as another one we already have. Thus, we closed this one as a duplicate. You can search for existing issues here. See also our issue reporting guidelines.

Happy Coding!