Button allowing to copy uuid for each sample in box detail

[leandroradusky]

Closes #1967

Now, in the box detail, there is a button allowing the copy for each sample uuid composing the box.

[ysbaddaden]

This is fine, yet from a design point of view I'd like the buttons to be vertically aligned.

[leandroradusky]

Now it looks like this :)

[ysbaddaden]

A horizontal flex would be more flexible, but that will do.