Request: Allow immediate typing if current value == 0 or 0.00

[StainlessStlRat]

When the user clicks on a field that has already been pre-populated with a 0 value, it'd be nice if it allowed typing the new value immediately. Right now, a user has to delete all of the zeros before they begin typing a new value.

As a workaround I'm leaving it empty currently, but this behavior diverges from how I have this implemented in the iOS version of my app, so not perfectly ideal.