[Feature request] add color for low insulin remaining amounts

[RandomLuck-7]

I keep overlooking the "0 U" of remaining insulin, and then winding up at the dinner table (or a restaurant!) without enough insulin for the meal at hand. I thought it might be a nice iAPS feature if the color of the remaining units number could change as the insulin reservoir gets near to empty. Perhaps yellow for 10U, orange for 5U and red for 0U similar to the way the battery icon now changes color.

[Jon-b-m]

Request accepted!