Topbar new data-options value 'adjust_body_padding'

Topbar has a new data-options boolean value 'adjust_body_padding' set to 'true' by default (nothing changes with original). If the value is set to 'false', in the case of a fixed/sticky topbar the body padding-top is not modified. This is useful in the case of full-page elements, for example in the case of a parallax effect.