DOM renderer clips the top of the cell, cutting off tall glyphs like U+23A1 ⎡

[Tyriar]

VS Code issue: microsoft/vscode#172504
Same issue but on the bottom: #4067

Repro:

1. DOM renderer
2. Paste ⎡, 🐛 it's cut off since we clip the lines on the DOM renderer to avoid overlapping (wonder if we can just remove the overflow:hidden?)