message: Initialize Font variables in constructor init list
diff: using namespace NAS2D;
  -ProductListBox::ProductListBox()
  +ProductListBox::ProductListBox() :
  + mFont{&fontCache.load(constants::FONT_PRIMARY, 12)},
  + mFontBold{&fontCache.load(constants::FONT_PRIMARY_BOLD, 12)}
  {
  item_height(30);
  - mFont = &fontCache.load(constants::FONT_PRIMARY, 12);
  - mFontBold = &fontCache.load(constants::FONT_PRIMARY_BOLD, 12);
  }
  