PR view shown empty after switching between SCM and PR viewlet

[chrmarti]

Issue Type: Bug

Testing microsoft/vscode#69255

Extension version: 1.50.0
VS Code version: Code - Insiders 1.32.0-insider (393b48d4a5de85b6fa1d2ad0a59588d6715e12ea, 2019-02-25T01:33:51.804Z)
OS version: Darwin x64 18.0.0

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-4770HQ CPU @ 2.20GHz (8 x 2200)
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: enabled rasterization: enabled surface_synchronization: enabled_on video_decode: enabled webgl: enabled webgl2: enabled
Load (avg)	2, 3, 3
Memory (System)	16.00GB (0.93GB free)
Process Argv	--extensions-dir /Users/chrmarti/Development/repos/tmp/ext --user-data-dir /Users/chrmarti/Development/repos/tmp/user pullrequest-demo
Screen Reader	no
VM	0%

[chrmarti]

Only when already expanded, it works fine if it is collapsed in the SCM viewlet.

[joaomoreno]

Yup same here.

[RMacfarlane]

Should already be fixed by #969