Fix build warnings

couple of warnings show during build

./components/LastBlocksWidget.tsx 177:5 Warning: React Hook useCallback has an unnecessary dependency: 'isMobile'. Either exclude it or remove the dependency array. react-hooks/exhaustive-deps

./components/ui/AdditionalDetails.tsx 34:6 Warning: React Hook useEffect has a missing dependency: 'handleKeyDown'. Either include it or remove the dependency array. react-hooks/exhaustive-deps