Tooltip creation is not working

[romaintailhurat]

When formatting a declaration label, it is possible to add a tooltip on some part of the text. Unfortunately, in the dev-cra branch, this is not working: the usual text field that appears when clicking on the "link" button don't appear anymore.

This is a high priority issue 🔥

[loichenninger]

Upgrading the project to React 17 broke the link popover. The problem and correction are explained in the issue : https://github.com/sstur/react-rte/issues/409. I forked the project of the dependency, applied the fix and put my repository as the dependency temporarily. When the fix will be applied in gillespie59-react-rte, we'll switch back to this npm package.