refactoring header so it accept modifiers as well as having a backgro…

Feature/133 add address field

Feature/124 login frontend

Feature/breadcrumbs

Feature/137 listings

removing person page title override so the persons name is moved in to the header and follows suit of other child pages

bugfix - page title in ie11 not honouring flex spacing so made the wrapper a flex container, grow it to fill the available space and align title to the bottom of the header

Feature/133 address frontend

adding vendor prefixes for appearance before build for testing, as appearance is not widely supported