Fix numeric suggestions in command arguments

[Ghoulboy78]

Fixes #961 It turns out I didn't need to implement what happens when max is defined and not min, as apparently that's not even allowed, so less work for me

[Ghoulboy78]

Ok, I have added it, also making sure that I respect the 'suggest' parameter (which in the first draft I didn't), as well as making sure that with regards to int arguments, there be dealing with long type arguments, so that when converting to strings for the suggestions they lose the .0 suffix which got added accidentally.