Round mem values

[almson]

Mem requests/limits should not be displayed with 12-digit precision. It's not how UI tools should work. Just round up and don't display more than 4 significant digits. Also it would be nice if we could choose base-10 or base-2 units. (Base-2 units are inconvenient except for very specific usecases and the industry is slowly moving away from them.)

[towolf]

And I would like to see "full core" units (not millicores) and Gibibytes. Should be a CLI flag, and not changed on every row.

Would just make it abit easier to read.