Corrected a typo and add some new features

- Corrected in fDXCCStat.pas stCfmOnly, line 855 typo CW -> DIGI
+ New preferences (Fonts) for settings of gridlist style for better readability
  Add a option for 'greenbar' style
  Add a option for bold font in title line
  Add a option for row height to Font Size + 8
  Add a option for dots instead spaces in DXCCStat