Locale cleanup from the locale atlas

- An empty select "" carries no key=: the prompt keys go from the
  scenarios and from the locale files.
- Scenario option strings live only in scenarios_<lang>.properties; the
  duplicates in en/ru.properties are removed.
- English names/info for the map zones (mapzone/home, town_entry).
- locale/scenarios_ru.properties: Russian scenario strings get their own
  file next to scenarios_en.

scenarios/home/home_vestibule_default.scenario

@@ -2,7 +2,7 @@ scene: home_vestibule
 priority: 40
 ---
 light_set [{"x":0.32427186,"y":0.5831858,"radius":300,"influence":1,"color":"#ffff00"},{"x":0.11262136,"y":0.44159293,"radius":300,"influence":0.6,"color":"#ffff00"}]
-select "" key=vestibule/diner/prompt
+select ""
 option "В рабочую комнату" key=vestibule/diner/opt_workroom -> :workroom
 option "В обеденную комнату" key=vestibule/diner/opt_dinerroom -> :kitchen
 option "В спальню" key=vestibule/diner/opt_bedroom -> :bedroom