Add option to navigation bar to not hide on scroll

[mapsgeek]

Is your feature request related to a problem? Please describe.
I'm trying to not hide the Navbar on scroll but i'm not sure if this can be achieved with the onHide prop

Describe the solution you'd like
pass a prop scrollHide={true/false} and this would control the option to make it hide or not"
or provide an example on how to do that using the current props.

[mainframev]

Hi, I will add a new prop hideOnScroll which you will have to set explicitly to false. ;)

[mainframev]

solved in #3282