Use *.po instead of *.ts

[xiangzhai]

Hi @hellogithubok

As described in https://github.com/isoft-linux/isoftapp/blob/master/README

lupdate qml/*.qml -ts translations/qjade_zh_CN.ts
lrelease translations/qjade_zh_CN.ts

Please follow qwx _Use po && ki18n instead of qstr and tr_ https://github.com/xiangzhai/qwx/commit/f5151abceac1b7c6701a57dbcd988f9567c0e8ff

Regards,
Leslie Zhai

[xiangzhai]

isoft-update-client is also use ki18n and po https://github.com/isoft-linux/isoft-update-client/blob/master/plasma/package/contents/ui/main.qml#L48