Define container height without inline styles

I understand the inline styles of .leaflet-container are due to the possibility to define the height of our map containers in the backend.

But with responsive design it's often a requirement to set a map's height dynamically depending on the height or width of the browser viewport. Right now we have to use !important statements to override the inline style set by the module.

To avoid this we could allow to leave the height value in the backend empty and providing either a default height via CSS, or leave it at no height at all and give users a hint that they need to set the height in their theme's CSS if they don't fill out the form.

Cheers,
Daniel