Slow/sluggish/choppy scrolling of text lists (like Files, Log, Commits, etc)

On SmartGit for Mac OS X, the scrolling of the lists is slow and choppy. These lists are things like Files window, or Log window, or Commits list.

Other apps like SourceTree (or virtually all other Mac apps) will scroll these lists much faster and smoother.

Also need a way to customize the font size in these lists.