Ken thinks, and I agree, that when using the drop-downs, that we should use one
left arrow and one right arrow button, which would move the months.
Also, we could make the drop down menu for the years just show, by default 5
years into the past and 5 years into the future. This range could be
configurable. It would always be a delta from the navigated date, so you could
chunk down to a further away year.
If we controlled the actual drop down menu more directly, then we could put an
up and down button right in it, which would in-place chunk up or down the years.
And it would be nice to show the current navigated year in bold, in that menu.
Assigning to Mark.