This is a minor usability issue. The text where it says "KDE Plasma Version: 5.13.4" etc. is not copyable. I feel it should be as it allows for easier sharing. I tested other KCMs as well, and none of the text can be copied.
*** This bug has been marked as a duplicate of bug 366266 ***
Wow, I created bug-report for a bug that was fixed _yesterday_ The solution suggested in that thread is of adding a button, which seems fair. But do you think we should still make the text elements selectable?
> But do you think we should still make the text elements selectable? I like that idea. Recently, there was a change written for the file properties dialog: The value fields are now also selectable and copyable.
> Wow, I created bug-report for a bug that was fixed _yesterday_ This is one of those cool moments when you work for Free Software projects :-)
I am not sure this necessarily make sense from an effort vs. use point of view with the new copy button in the picture. Conceptually the about-distro module does not have a string "KDE Plasma Version: 5.13.4". It has the two strings "KDE Plasma Version:" and "5.13.4" (and it doesn't even particularly know that the two belong to one another). We could easily make either side selectable, but then does that really have a lot of use? You can actually see the problem in the Memory module. The text in the memory table is selectable, but each line is really comprised of 3 distinct elements that you can copy individually instead of as a whole. On top of that there's the problem that by default non-interactive space is dragable space (i.e. if you click and press anywhere on empty space you can drag the window). Which makes selecting by dragging a bit hit-and-miss at the best of times.
I agree with Harald that the "Copy to Clipboard" button resolves this in a way that's good enough. :)