McDonald’s wants to be a bigger player in the global coffee business. The world’s biggest hamburger chain on Thursday highlighted beverages as one of its key growth opportunities at a day-long presentation for investors. … The push comes as Starbucks Corp. is enjoying strong sales growth even in the choppy economy. In the latest quarter, the Seattle-based chain said global sales rose 7 percent at locations open at least a year. At McDonald’s, the figure edged up 0.9 percent. …