set the left when the clientWidth is too small

//set left if the [datetimepicker_windiws] over the width ^_^
I test it on my I9100 (480x800)
I performs well!
set the left when the clientWidth is too small 

//set left if the [datetimepicker_windiws] over the width ^_^
I test it on my I9100 (480x800)
I performs well!
Merge pull request #246 from j3l11234/master

set the left when the clientWidth is too small