datepicker title error

[dasoncheng]

Reproduction link

https://stackblitz.com/edit/ng-zorro-antd-start-5kk44y

Steps to reproduce

Select a date and hover over the "last year" or "next year" icons

What is expected?

can hide or customize the content of the title

What is actually happening?

the content is "上一年 (Control键加左方向键)"，Testers think it's not rigorous to use "Control" on Windows

Environment	Info
ng-zorro-antd	7.5.1
Browser	chrome 75.0.3770.100

[darshanrampatel]

This looks like it is coming from: https://github.com/NG-ZORRO/ng-zorro-antd/tree/master/components/i18n/languages/calendar

E.g.

ng-zorro-antd/components/i18n/languages/calendar/zh_CN.ts

Line 28 in 2c03fb7

previousYear: '上一年 (Control键加左方向键)',

[dasoncheng]

@darshanrampatel thx, requirements have been implemented by changing language objects

import { zh_CN } from 'ng-zorro-antd';
zh_CN.DatePicker.lang.nextYear = '下一年'
zh_CN.DatePicker.lang. previousYear = '上一年'