Game info: Improve property management related to the game

Add property HA to the game info list.
Add property names for properties GN, ON, GC and RO. i18n template file is
updated. French translations are fully done.
Warning: Translations for Italian and Czech are not done for properties GN,
GC and RO.

Property US (Provides the name of the user (or program), who enter the
 game.) has not been added, because I don't know how to name it shortly.