fix arpa project times in build queue

[Daxtorim]

All queued items' times are based on the remaining segments of the currently being build project, making the time for subsequent queued items of the same project useless. This will calculate the correct times. Do this by keeping track of which projects are queued up and only calculate time based on remaining segments for the first item in the queue of each project, otherwise calculate time based on building 100% of segments.