With a large sliding glass door like mentioned (split in the middle with only one side opening), what's the best solution? The door is used for entry to an outdoor living space, and in the evening, it would be good to have it closed (or on command when the sun is too bright). However, as an exit to the home, no one would want to wait a long time for it to open as they would just be waiting. What have you folks done in such a situation?