- Import aliasing symbol in file
- Missing function calls in conditional
- Missing return statement

Use an empty string instead of null for reseting styles

Fixes cases where styles value can no longer be null

For #81574

Fixes #81887

Related xtermjs/xterm.js#291

and handle flipped highlight start and end

Fixes #62211

Fixes #81911

Fixes #81949

Fixes https://github.com/microsoft/vscode/issues/73580

#81574

Fixes https://github.com/microsoft/vscode/issues/78817

related to #78168

This reverts commit 4fe8b829.

Part of #81574

Part of #78168