Use class .clipboardjs-tooltip instead of .tooltip to prevent collisions with other code

stefan.korn → made their first commit to this issue’s fork.

The changes seem very reasonable, because the class .tooltip will interfere with Bootstrap: https://getbootstrap.com/docs/5.3/components/tooltips/#markup

So probably every Bootstrap theme that uses tooltip will be affected.

I can tell for Bootstrap5 → theme. The clipboard button is visually broken there.

The MR is good but the CSS class selector was missing the dot, so I changed this.

I also dare to change the category to "Bug report" as I suppose breaking Bootstrap is maybe an issue.

There was one more occurence of .tooltip class in textarea.css