Simple duration tracking

[aapis]

My workflow at the moment is to note when I'm starting an activity and when it is done. Would be nice if, when entering "done", the most recent record with the same job ID were updated with the duration rounded up to the nearest ProjectConfig (new) duration "window" (1, 5, 10, 15, 30, 60 min options).

For example, if you start a meeting at 2:00 and record "done" at 2:10 on a project where the "duration window" is 15 mins, the record representing the start of the meeting is edited to include something like "[Duration: 0.25hr]". The "done" record is not created.

Could also accomplish this using a new button on each row. Not sure what icon but the button help could be "Mark activity complete".