src/vs/workbench/contrib/terminal/browser/xterm/commandNavigationAddon.ts/CommandNavigationAddon/clearMarker
class CommandNavigationAddon:	clearMarker(): void {
		// Clear the current marker so successive focus/selection actions are performed from the
		// bottom of the buffer
		this._currentMarker = Boundary.Bottom;
		this._selectionStart = null;
	}