Because of the way the tick logic works, 0 (or any negative number) for
LowPowerSlowdown is functionally equivalent to 1. But LowPowerSlowdown
is multipled by a time in several cases, so while 1 will produce the
correct result (no slowdown), 0 will say that the time remaining is
00:00. Forbid nonpositive values, and correct the d2k mod which was
using 0.
Additionally, in the production tooltip, the colour should display as
white even in low power if there is no slowdown.
Objectives can be either primary or secondary objectives. Primary ones
influence the outcome of the game. If all primary objectives are
completed the game is won, and lost when any of them fails.
Objectives can be added at any stage during the game, allowing to react
dynamically to game events.
The objectives backend only contains the information about the
objectives themselves. It does not check if objectives are completed or
failed. Instead, the state of objectives must be manually marked. The
backend, however, does check whether the game is won or lost.
