"Select all" on CODE portions

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http://ubuntuforums.org – Often when someone posts code between CODE tags, you need to copy-and-paste it on your own machine in order to test it. If the code is long, selecting it can be a bit tedious, especially when you don't have a "real" mouse (e.g. on a laptop with only a trackpad, or even on a phone or tablet). Other forum engines such as phpBB provide a "select all" link above CODE portions, which does just that. Would it be possible to implement it here? Thanks (Hardware)