Timeslider: Smart display of authorship info
Timeslider: Fix calcPath()'s smart overshooting feature

Don't overshoot with higher granularity if the granularity mark
is in between 'from' and 'to'.
e.g. not 34->33->32->31->30->20->21->22->23->24->25->26
(instead 34->33->32->31->30->29->28->27->26)