Going to next or previous month updates visualized date (but not the actual value)

[nonninz]

Hi,

first of all thank you for your calendar: it is great :)

If you click on the next/previous month arrows, the visualized date will be also increased or decreased by one month, without actually clicking on a date.

I think it would be better not to update the visualized value until the user clicks on a new date.

The actual value passed to the form, the one in the hidden field, will not be updated though.

[jockmac22]

Merged your changes into the v0.2b branch.