Suggestion details shown on the left of suggestion list hide text and cursor

Issue Type: <b>Bug</b> Trigger suggestion on a small enough VS Code window, and it renders suggestion details on the left of suggestion list, completely hiding code snippet and cursor. Suggestion details can be resized, but since its bottom right corner is glued to the suggestion list, it still hides the input unless you resize it to be so small that it's useless. <img width="1024" alt="Screen Shot 2020-11-06 at 13 51 02" src="https://user-images.githubusercontent.com/68182/98358049-2cb0b380-2037-11eb-9d3e-294e420df720.png"> <img width="1024" alt="Screen Shot 2020-11-06 at 13 51 10" src="https://user-images.githubusercontent.com/68182/98358069-32a69480-2037-11eb-95ba-934f02fef301.png"> VS Code version: Code 1.51.0 (fcac248b077b55bae4ba5bab613fd6e9156c2f0c, 2020-11-05T18:14:40.758Z) OS version: Darwin x64 19.6.0 <details> <summary>System Info</summary> |Item|Value| |---|---| |CPUs|Intel(R) Core(TM) i5-1030NG7 CPU @ 1.10GHz (8 x 1100)| |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)|2, 2, 2| |Memory (System)|16.00GB (0.32GB free)| |Process Argv|-psn_0_2912967| |Screen Reader|no| |VM|0%| </details><details><summary>Extensions (6)</summary> Extension|Author (truncated)|Version ---|---|--- vscode-markdownlint|Dav|0.37.2 vscode-pull-request-github|Git|0.21.0 go|gol|0.18.1 remote-ssh|ms-|0.55.0 remote-ssh-edit|ms-|0.55.0 rewrap|stk|1.13.0 (1 theme extensions excluded) </details> <!-- generated by issue reporter -->