When building for wx3 on Linux, the backported number validators
and formatter conflicts with the wx3 version because I never
renamed them. Crashes during termination would occur because
the wx3 version and our version had different vtables.
I was thinking that we would just be able to delete the
backported version when upgrading to wx3, but since
we've made Audacity specific changes to them we can't
simply start using the real wx3 versions anymore.
Therefore, I needed to rename then to prevent the crashes.
The are pretty darn slick. There's an integer one and a floating point
one. They support automatic range limiting (ex., you can't even type a
number outside of the range), proper number formats (ex., you can't
enter a decimal point in an integer field), you can't enter bogus
numbers like "0.3-.2", thousands separators are supported, decimal
precision may be specified and proper number formatting for string
values (or automatic conversion to int, double, float, etc.).
