fix(ui-top-nav-bar): ensure Drilldown overflows correctly in small viewports in TopNavBar

INSTUI-4607

Author: ToMESSKa

packages/ui-top-nav-bar/src/TopNavBar/TopNavBarLayout/SmallViewportLayout/styles.ts

@@ -74,7 +74,6 @@ const generateStyle = (
     maxWidth: '100%',
     paddingBlock: 0,
     paddingInline: componentTheme.smallViewportInlinePadding,
-    position: 'relative',
     zIndex: componentTheme.smallViewportZIndex,
     display: 'flex',
     justifyContent: 'space-between',