Allow/Support fractions of an inch in the custom scale setting.

A peer of mine ran into an issue today trying to set the scale on a plan to 3/64" = 1'.

Currently the custom scale input boxes only seem to accept integers.

Expected behavior is that typing in "3/64" in the inches box will write out "3/64", but instead it "/" is dropped and the whole number "364" is written in instead.

Thank you for your time and attention to this matter.

To anyone else who needs help with this, the current work around for us was to calculate the real value of the fraction and input that integer amount into the input box.

Example: 3/64 = 0.046875

Accepted values in the boxes: 0.046875 inches = 1 feet