src/vs/workbench/contrib/terminal/browser/addons/commandTrackerAddon.ts/CommandTrackerAddon/selectToPreviousCommand
class CommandTrackerAddon:	selectToPreviousCommand(): void {
		if (!this._terminal) {
			return;
		}
		if (this._selectionStart === null) {
			this._selectionStart = this._currentMarker;
		}
		this.scrollToPreviousCommand(ScrollPosition.Middle, true);
		this._selectLines(this._terminal, this._currentMarker, this._selectionStart);
	}