src/vs/workbench/contrib/terminal/browser/terminalInstance.ts/TerminalInstance/changeIcon
class TerminalInstance:	async changeIcon() {
		const items: IQuickPickItem[] = [];
		for (const icon of iconRegistry.all) {
			items.push({ label: `$(${icon.id})`, description: `${icon.id}` });
		}
		const result = await this._quickInputService.pick(items, {
			matchOnDescription: true
		});
		if (result && result.description) {
			this.shellLaunchConfig.icon = iconRegistry.get(result.description);
			this._onIconChanged.fire(this);
		}
	}