Legendary bandleader Glenn Miller only made two film appearances as an actor.  20th Century Fox’s 1941 musical Sun Valley Serenade introduced two standards into the American Songbook – “Chattanooga Choo Choo” and “At Last” – and earned three Academy Award nominations.  Its 1942 follow-up, Orchestra Wives, moved Miller from featured status to above-the-title billing and introduced another Oscar-nominated hit, “I’ve Got a Gal in Kalamazoo.”  Yet both films, and their remarkable treasure trove of music, have remained largely unheralded.  The Kritzerland label is setting out to change that with the first-ever complete…