By Harry Davies Conor McGregor heaped praise on Dana White after guaranteeing UFC 300 fighters $300,000 in bonuses. UFC fighters can usually earn $50,000 in bonus money if they are awarded Performance of the Night or Fight of the Night. The promotion has rarely increased this amount in the past, but UFC boss White has upped it by six times for this Saturday’s mega-event at the T-Mobile Arena in Las Vegas. Justin Gaethje and Max Holloway, who fight for the symbolic ’BMF’ title on the card, campaigned for the bonuses to be raised last week and White granted their wish at the UFC 300 press confer…