class short-asc and short-desc doesn't apply to datatable-body-cell

[GuillaumeGascon]

I'm submitting a ... (check one with "x")

[x] bug report => search github for a similar issue or PR before submitting
[ ] feature request
[ ] support request => Please do not submit support request here, post on Stackoverflow or Gitter

Current behavior

When you sort a column, a class short-asc or short-desc is applied to datatable-header-cell but not datatable-body-cell

Expected behavior

When you sort a column, short-asc or short-desc should be applied to datatable-header-cell and datatable-body-cell as mentioned to the documentation : https://swimlane.gitbook.io/ngx-datatable/readme/themes

Reproduction of the problem

Nothing special

What is the motivation / use case for changing the behavior?

Please tell us about your environment:

OS: Ubuntu 22.04.1 IDE: VSCode Node: 14.21.1 NPM: 6.14.17

• Table version:

NGX-Datatable: 20.1.0

• Angular version:

Angular: 15.1.5

• Browser: [all | Chrome XX | Firefox XX | IE XX | Safari XX | Mobile Chrome XX | Android X.X Web Browser | iOS XX Safari | iOS XX UIWebView | iOS XX WKWebView ]

Tested on Firefox 109.0.1 & Chromium 110.0.5481.100

• Language: [all | TypeScript X.X | ES6/7 | ES5]