The "copy link" to clipboard button ancestrally used a flash (.swf) dependency (ZeroClipboard) to work. Since Odoo honours its history, it was still there. However on Firefox you are asked to activate flash to make it work, and on Chrome nothing happens. We get rid of this shibboleth, using instead clipboard.js that is already used elswhere for the same purpose. closes #27958 opw 1896509