title: dynamic tooltips in ngx-datatable
body: <p>I 've created an angular sample app which includes ngx-datatable component <a href="https://stackblitz.com/edit/angular-z6immo" rel="nofollow noreferrer">here</a>. I've added the same tooltip in first column for each cell. Everytime you push the button in first column you copy the text and I want to change tooltip's text to "copied" dynamically. Could you check it? thanks</p>