Changed the default date_format (Removed leading 0 on 1-9 days)

If the date is between the 1st and 9th of the month the date number has a leading zero, which looks a little weird.

eg: 07:15 PM Nov 02nd

I know that I can change this in the date_format settings, but I think the day should be %e instead of %d by default.

(Not sure why it's suggesting that I made a change on line 278 (I didn't)).