Let's just say that you bought tickets to your favorite musical but had to sit in the back because those were the only seats available for a wheelchair user. Or you're a woman who needed to use the bathroom at intermission, but the lines were so long you had to miss the first 10 minutes of the second act. If you've been to the Community Center Theatre since it opened in 1974, you could have experienced a problem of this sort, said Convention Center Manager Judy Goldbar. Luckily, those are two major issues that a proposed $40 million renovation seeks to address. The theater, run by the Sacramento Convention Center, hosts a number of local and touring productions, including Broadway Sacrame