Add a meridian flip "window"

[Oaklandish]

I propose we add a window of time to the meridian flip logic. This would have a user defined max time past the meridian and the logic will see if a sub can be completed in time so as to not go past this hard limit of max time past the meridian before the flip occurs. So if I have a max time of 13mins past the meridian and a sub of 15 minutes in the queue it will not wait for the full 13 mins after the meridian before it flips. It will instead, flip immediately after the meridian passes and then start the next sub. We might need to also include a meridian min time as well as some mounts might not like flipping directly at the meridian and plate solves might be off.

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[Stefan B]

1.11 Nightly 14 will have a min and max time