adjust selected date functionality

[uptownjimmy]

Make current day (instead of the the max possible day) the default selected day when:

• user opens datepicker modal
• user selects a day that will be past the maxTestDate if user then selects nextMonth
• user clicks nextMonth

Notes:

• Previous functionality would have the highest possible day selected, which is confusing.
• Ideally, no day would be selected under these circumstances, but that seems difficult given the nature of the code logic.