Make alert icon blink interval moddable

[eradicator]

Because "Option to disable no-power flashing" came up again and it seems like nobody ever officially requested modding support for this:

Would it be possible to expose the delay with which alerts blink (no-power, no-network, etc) as a utility constant? Presumably so that setting the constant to a very large number would effectively disable the blinking? While preserving the ability to just make it a bit slower.

As far as i understand this would be a pure rendering change and should not affect game logic?

[Silari]

As someone who made one of the mods linked in that thread, this would be very nice to have.

Although I'd think using '0' to mean 'disable blinking' would make more sense.