Twitter announced today it will begin testing a new set of features for TweetDeck, the company’s often-ignored social media dashboard aimed at Twitter’s power users, which Twitter may soon turn into a new subscription service. According to a post from Twitter Product Lead Kayvon Beykpour, the revamped version of the Twitter client will include a full tweet composer, new advanced search features, new column types and a new way to group columns into clean workspaces.