MultiSelect Dropdown

Requesting the addition of a MultiSelect Dropdown control type. There are many times when a checklist (which is currently the only multi-select option available) makes the form way too long and a repeater does not provide the functionality needed (limits the ability to remove selections) for questions with multiple answers. It would be of great benefit to us to have a MultiSelect Dropdown (which is pretty common) to allow users to select multiple options from a preset list of options.