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