Clicking on settings checkboxes sometimes dropped after changing another setting

Issue Type: <b>Bug</b> **repro** 1. With setting sync enabled 1. Open settings 1. Click on a setting value checkbox 1. Then click on another setting value **Bug** Sometimes nothing happens when you try changing the second setting. It seems timing dependent but the second click can have no effect for around a second after the first  VS Code version: Code - Insiders 1.50.0-insider (cca20eba8974b1d6b6a9b71bf4e60a29c8f26648, 2020-09-12T00:56:22.923Z) OS version: Darwin x64 19.6.0 <details> <summary>System Info</summary> |Item|Value| |---|---| |CPUs|Intel(R) Core(TM) i9-9980HK CPU @ 2.40GHz (16 x 2400)| |GPU Status|2d_canvas: enabled<br>flash_3d: enabled<br>flash_stage3d: enabled<br>flash_stage3d_baseline: enabled<br>gpu_compositing: enabled<br>metal: disabled_off<br>multiple_raster_threads: enabled_on<br>oop_rasterization: enabled<br>opengl: enabled_on<br>protected_video_decode: unavailable_off<br>rasterization: enabled<br>skia_renderer: disabled_off_ok<br>video_decode: enabled<br>webgl: enabled<br>webgl2: enabled| |Load (avg)|4, 3, 3| |Memory (System)|32.00GB (3.15GB free)| |Process Argv|--crash-reporter-id cc7f0c9b-aa2b-4a45-8baa-81ffda32679e| |Screen Reader|no| |VM|0%| </details> <!-- generated by issue reporter -->