In forms: Keep window open for multiple select/linked record question until clicked away

For multi-select fields (including linked record fields that allow for multiple) - it would be a HUGE time-saver if the window to select the options stayed open until you clicked off. As it stands, when you click an option, the window closes down, then you have to click it again and start typing again. Sometimes the select items are all next to each other and it would be nice to just click them all at once.