Chinese lang filename not match the sources code and some translations wrong

[Himmelt]

Describe the bug

Chinese Simplified lang file should be "zh-cn"/"zh_cn"/"zh_CN" but actual is "qt_zh_TW".
And some translations was wrong with 1.1.7. For example, "Quit" should be "退出" but atual is "辞职", "Setup" should be "设置" but actual is "体系". However , I found it's right in sources code at

Serial-Studio/assets/translations/zh.ts

Lines 1533 to 1536 in 0a16c90

	<message>
	<source>Quit</source>
	<translation>退出</translation>
	</message>

Serial-Studio/assets/translations/zh.ts

Lines 1831 to 1834 in 0a16c90

	<message>
	<source>Setup</source>
	<translation>设置</translation>
	</message>

So, just needs updating ?

Screenshots