add copy to clipboard button to barcode reader
Some apps like 2FA manager provide the option to paste links and process them e.g. to create a otpauth entry. Those apps are not always listed as possible destinations for content hub. So we are unable to share that content to that app.
This MR does add a "copy to clipboard" button that will allow to copy&paste all content to other apps via the clipboard.
Tested and worked on OP5T, devel with 2FA manager.