KANSAS CITY, Mo. — TCU basketball needed its biggest comeback in the Jamie Dixon era to avoid a one-and-done showing at the Big 12 Tournament. The Frogs got it. They stormed back from a 20-point first-half deficit to stun 4-seed Texas, 65-60, in the quarterfinal round Thursday afternoon at the T-Mobile Center. TCU (20-11) advances to the semifinals where it’ll face the winner of the Kansas-West Virginia game. Tip-off for that game is set for 6 p.m. Friday. Texas (21-11) exits and will await its March Madness fate on Selection Sunday. With the game tied 60-all with 1:01 left, TCU scored the go-…