sidenav safari fix (#712)

* add fix

* Update src/components/Sidenav/SidenavBase.style.ts

Co-authored-by: Klaudiusz Dembler <accounts@kdembler.com>

Co-authored-by: Klaudiusz Dembler <accounts@kdembler.com>

src/components/Sidenav/SidenavBase.style.ts

@@ -30,6 +30,7 @@ export const SidebarNav = styled.nav<SidebarNavProps>`
   position: fixed;
   top: 0;
   bottom: 0;
+  height: 100%;
   z-index: ${zIndex.sideNav};
   width: ${({ expanded }) => (expanded ? `${EXPANDED_SIDENAVBAR_WIDTH}px` : 'var(--sidenav-collapsed-width)')};
   transition: width ${transitions.timings.regular} ${transitions.easing};