[QA] Remove unused parameter

Companion fix to commit SHA1: 0ab355252e7f5431a1765140520acb79bcf7a5cb
Improve ordering of date/time output on time graphs.
Ensure track bounds are initialized correctly during track creation.

I believe this flaw was somehow triggered by the change in commit SHA1: a8e8ffe1f3a69f2c4263229773aa9a60fdae4049
SF Features#100: Allow changing of the time of trackpoints.

Simply via a spinbox of the timestamp on the trackpoint edit dialog.

Only really useful for changing the time by a few seconds.
SF Features#100: Allow 'easy' changing of the time of trackpoints & waypoints.

Add and use a dialog to get the time and date in the users timezone to allow setting the timestamp.
The dialog uses the calendar widget to get the date and spin boxes for the hours, minutes and seconds.
Allow setting timestamps on trackpoints and waypoints that previously had none.