⌘C does not copy text from world or log view

To reproduce:

* In either world or log view, select some text from a panel / the log.
* Press ⌘C (or, presumably, ^C on Windows / Linux).
* Try pasting the text into the command line.

Expected behaviour: selected text is pasted.

Actual behaviour: whatever was previously in the clipboard is pasted. In the log view (but not world view), ⌘C will cause the selected text to be highlighted in grey instead of blue, but no copying will be performed.