Allow actions to continue running until botcheck while offline

When going to bed, outdoors, or otherwise away from the computer for an extended period it is customary to close one's web browser. Allowing actions to continue until the normal botcheck time while the game tab is closed would allow players who want to get the most out of their game time to still be able to close their browser without missing out on potential progress. It would also reduce strain on the server from users keeping the game open all night constantly sending requests even while their actions are paused because of the botcheck timeout.