By David McDonnell If ever a victory papered over the cracks, this was it. Everton became the fifth side in six Premier League games to register at least 20 shots against Manchester United, further proof of the underlying vulnerability of Erik ten Hag’s side. That Sean Dyche’s side were unable to turn those shots into the hard currency of goals owed as much to their lack of conviction in front of the target as it did to United’s defensive resilience. Conceding so many goalscoring opportunities to a side as wasteful as Everton is one thing. But if United are as obliging in Sunday’s FA Cup quart…