Enhance Block Scheduling Options

[Dan-Peck]

Currently, block scheduling options are restricted to "Weekly" selections (i.e., Active between the Hours of X and Y on Days A, B, and C).

Having some additional options available would improve the usability of this feature to help people display blocks on specific dates in the future, for such events as birthdays, billing reminders, etc.

In order to accomplish this, we would like to add a new "Occurrences" selector to go alongside the "Day" and "Time" selectors. The selections will be:

• Weekly (Default)
• Monthly
• Between Dates

The "Weekly" option will remain the same as the current implementation operates.

The "Monthly" option will allow specifying a day number, representing "on the Xth day". e.g., "15"

The "Between Dates" option will accept two dates, selectable via a mini-calendar-picker. e.g., From "August 15", to "September 1".

[Dan-Peck]

Merged in @ 9688d45 and added to the queue for upcoming release to the live site.