Refactor model: overhaul starting and ending times of jobs (calculation and fitting)

This MR introduces the use of QDateTime for starting and ending times of jobs instead of QString. In the future the "duration" attribute will become obsolete because it can be easily calculated if the starting and ending times are available in a usable format. The times are saved in ISO format in the SessionItems and are currently displayed as such in the job view, but since that is overhauled too, this will be corrected soon.

requested review from @m.puchner

assigned to @m.puchner

added 1 commit

• 6f3ba806 - Overhaul starting and ending times of jobs (calculation and fitting)

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removed review request for @m.puchner

assigned to @t.knopff and unassigned @m.puchner

approved this merge request

merged

mentioned in commit 1d9ea98e