Shouting seems entirely reasonable, as for swearing at a football match (your way of wording suggests you think this was not unreasonable)- why should being at a football match make this anti-social behaviour acceptable?
As far as I am aware the fine would be a 'spent' conviction after 5 years.
I would regard to to the actual conviction, I like Dave will 'accept' your story, however I am sorry but my opinion is that no application panel would be likely to. Unfortunately the court didn't so it seems reasonable to assume that no other group would.
I would go ahead with the application and await their comments, but be prepared to have to re-apply after the conviction is spent, sorry. Also avoid swearing and loud, demonstrably 'breach of the peace' behaviour anywhere, and - yes - even at football matches.
Is it interesting that swearing and shouting and general ASB behaviour is extremely unusual at rugby matches.......................