PHILADELPHIA – They picked Markell Bell with the 68th pick overall in the draft on Friday night, then waited, waited, and waited some more.   They were supposed to pick at No. 98, near the end of that night’s third round, but that selection got sent to the Vikings for pass rusher Jonathan Greenard. They were supposed to choose two prospects in the fourth round – at Nos. 114 and 137 – but both picks got shipped to Dallas to move up for receiver Makai Lemon. Those deals meant the Eagles had to bide their time waiting until they were on the clock again with the 178th overall pick. In that time, from 68 to 178, 109 players were taken. “It was long,” said general manager Howie Roseman. “I think it was daunting when (assistant GM) Jon Ferrari is in the back of the room.…