Not showing pencil on left margin of settings.json

Issue Type: <b>Bug</b> Not showing pencil on left margin of `settings.json`.  VS Code version: Code 1.60.2 (7f6ab5485bbc008386c4386d08766667e155244e, 2021-09-22T12:01:43.795Z) OS version: Linux x64 5.4.0-88-generic Restricted Mode: No <details> <summary>System Info</summary> |Item|Value| |---|---| |CPUs|Intel(R) Core(TM) i5-8600K CPU @ 3.60GHz (6 x 4100)| |GPU Status|2d_canvas: enabled<br>gpu_compositing: enabled<br>multiple_raster_threads: enabled_on<br>oop_rasterization: disabled_off<br>opengl: enabled_on<br>rasterization: disabled_software<br>skia_renderer: enabled_on<br>video_decode: disabled_software<br>vulkan: disabled_off<br>webgl: enabled<br>webgl2: enabled| |Load (avg)|2, 1, 1| |Memory (System)|31.03GB (16.57GB free)| |Process Argv|--unity-launch| |Screen Reader|no| |VM|0%| |DESKTOP_SESSION|cinnamon| |XDG_CURRENT_DESKTOP|X-Cinnamon| |XDG_SESSION_DESKTOP|cinnamon| |XDG_SESSION_TYPE|x11| </details>Extensions: none<details> <summary>A/B Experiments</summary> ``` vsliv368cf:30146710 vsreu685:30147344 python383cf:30185419 pythonvspyt602:30300191 vspor879:30202332 vspor708:30202333 vspor363:30204092 vswsl492cf:30256860 vstes627:30244334 pythonvspyt639:30300192 pythontb:30283811 pythonptprofiler:30281270 vshan820:30294714 vstes263:30335439 pythondataviewer:30285071 pythonvsuse255:30340121 vscod805:30301674 pythonvspyt200:30340761 binariesv615:30325510 vsccppwt:30364497 pythonvssor306:30344512 bridge0708:30335490 pygetstartedt2:30371810 dockerwalkthru:30370836 bridge0723:30353136 pythonrunftest32:30373476 pythonf5test824:30373475 javagetstartedt:30364666 pythonvspyt187:30373474 pydsgst2:30361792 vsqsis200:30374795 ``` </details> <!-- generated by issue reporter -->