src/vs/workbench/contrib/terminal/browser/terminalTabbedView.ts/TerminalTabbedView/_getLastListWidth
class TerminalTabbedView:	private _getLastListWidth(): number {
		const widthKey = this._panelOrientation === Orientation.VERTICAL ? TerminalStorageKeys.TabsListWidthVertical : TerminalStorageKeys.TabsListWidthHorizontal;
		const storedValue = this._storageService.get(widthKey, StorageScope.GLOBAL);

		if (!storedValue || !parseInt(storedValue)) {
			// we want to use the min width by default for the vertical orientation bc
			// there is such a limited width for the terminal panel to begin w there.
			return this._panelOrientation === Orientation.VERTICAL ? TerminalTabsListSizes.NarrowViewWidth : TerminalTabsListSizes.DefaultWidth;
		}
		return parseInt(storedValue);
	}