Hard to see negative sign when value is highlighted

[heybdj]

Negative signs don't get the green font colour treatment when the UI displays numeric values. This makes it hard for me to see, at a glance, if a number is positive or negative, especially when the value is being highlighted by the UI.

Here's an example. The first component of the rotation vector is negative, but it sure took me awhile to notice!

(This screenshot is also an example of issue #242).

Could negative signs be treated like decimals and receive the same green font colour? I think that would solve the problem for me.

Cheers!