Losing is never easy, but San Antonio Spurs coach Gregg Popovich and point guard Tre Jones see the glass half-full as the team looks to build on strengths for next year. A 128-117 loss to the Utah Jazz on Wednesday night makes it five straight for the San Antonio Spurs as the season comes to a close and the draft draws near. However, the defeat was met with a positive outlook from the team. “As long as they’re giving effort, they’re all learning, making mistakes but overall that’s what we’re trying to do. No matter who is out, no matter…