I don't know who at Tweetdeck decided that mapping Ctrl+T to something was a good idea, but they probably deserve to be fired.
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
I don't know who at Tweetdeck decided that mapping Ctrl+T to something was a good idea, but they probably deserve to be fired.