calendar selector is using UTC

[raedah]

The blocks page shows the block timestamp in normal time,
but the day on the left hand side of the page is in UTC,
and the pagination happens in UTC as well.
https://mainnet.decred.org/blocks

Other issues with the calendar selector are that it allows selecting of dates prior to Feb 8th for which there is no data. Also, when you open the calendar selector it defaults to todays date rather then the current date you are viewing.

[alexlyp]

Part 1 of this was recently fixed. All block timestamps are now in UTC.

I will try and disallow bad dates and try to preload the date selector with the date you are curretnly on.