If Matchbox Twenty brings their Slow Dream tour to Talking Stick Resort Amphitheatre on Wednesday night, it’s not the first time that the pop-rockers have played at Arizona’s Valley in the past. In late March, the multiplatinum band with Rob Thomas, the singer Rob Thomas came to the Icehouse in downtown Phoenix to film a couple of different videos of their performances and music Some of them was broadcast on television across the country in March…