Colorize/highlight the city growth if its negative

[jwrober]

Is your feature request related to a problem? Please describe.
If your city is consuming more food that is needed, it will lose population when the granary is empty. The counter in the city dialog in this example says 7 turns, but that is 7 turns to a smaller city, not a larger city.

Describe the solution you'd like
Colorize (e.g. make the text red) or highlight the value for change in value to bring more attention to it when growth is negative. Might consider doing the same thing for the negative food at the top.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Came up as part of evaluating PR #1494

[daavko]

Would it be worth it to colorize negative values for all outputs?

[lmoureaux]

What exactly should be colorized: only the number, only the value, or the whole line?

[jwrober]

I'm inclined to think that "7 Turns" is in red or some color to bring your eye to it. Maybe the "(-7)" could also be in red so the player can easily identify what is going on?