This is certainly going to be a day for messages to Celtic after the big win over Rangers in the Scottish Cup at Hampden yesterday afternoon. Already this morning we have discussed how theCeltic fans kept Daizen Maeda awake last night, Moussa Dembele’s class tweet and how Celtic’s Unique Angle captured Callum McGregor’s superb reaction to Adam Idah’s winner. And now, it’s the turn of Stan Collymore. The former Aston Villa man is a huge fan of the club and last night, he took the opportunity to send a message to Celtic after their big Scottish Cup win at Hampden. Collymore’s Celtic social media…