Correcting several issues with NumberInput

[Ultraxime]

I rewrote the logic of NumberInput to solve issues #308, #304, #299 and the problem with included and excluded bounds.

The NumberInput unlike the TypedInput never allows invalid entries.
People who try to implement a floating-point number should follow the way the f32 is done; it can end with a .

I also added the support for any characters in the number, it just has to always be a valid number, regarding the T::from_str function.

I merge content_width and width. It seems to fix issues #286 and #278

[genusistimelord]

thank you very much! I looked over it and the changes look good.

[Ultraxime]

Normally I checked with the examples
And with one of my projects so it should be working
But I'm still waiting for feedback

[genusistimelord]

I will fully test them tomorrow to see if I can find anymore issues and let you know. Other than that the best thing I can also do is ask those who had issues to try the master branch.