Change hyperlink keyboard shortcut to Ctrl+k

[hammer (Jeff Hammerbacher)]

Ctrl+k currently will apply the preformatted text style to selected text. Every other application I use will open the edit hyperlink dialog. It would be nice to bring Discourse in line with other applications.

[strager (Scott Trager)]

I really have to agree with this. I keep trying to link with ctrl-k as well.

[sam (Sam Saffron)]

@eviltrout probably worth reviewing the shortcuts while redoing composer

[codinghorror (Jeff Atwood)]

This was completed a while ago, ctrl+k it is now.