Add setting to use object land ground for purchased land

Default on

src/lang/extra/english.txt

@@ -733,6 +733,9 @@ STR_CONFIG_SETTING_IGNORE_OBJECT_INTRO_DATES_HELPTEXT           :Set whether pla
 STR_CONFIG_SETTING_ALLOW_CONVERT_TOWN_ROAD_NO_HOUSES            :Allow converting town roads to non-house types: {STRING2}
 STR_CONFIG_SETTING_ALLOW_CONVERT_TOWN_ROAD_NO_HOUSES_HELPTEXT   :Whether to allow players to convert town-owned roads to a road type which does not allow houses.{}This is off by default because doing so can prevent towns from building houses at all, resulting in them shrinking.
 
+STR_CONFIG_SETTING_PURCHASED_LAND_CLEAR_GROUND                  :Use clear ground tile for purchased land: {STRING2}
+STR_CONFIG_SETTING_PURCHASED_LAND_CLEAR_GROUND_HELPTEXT         :If enabled, purchased land is shown using the same ground type as clear ground tiles, i.e. bare ground to grass, coast, snow, desert, etc.
+
 STR_CONFIG_SETTING_SPAWN_PRIMARY_INDUSTRY_ONLY                  :Only generate primary industries: {STRING2}
 STR_CONFIG_SETTING_SPAWN_PRIMARY_INDUSTRY_ONLY_HELPTEXT         :If enabled, only primary industries are generated during game play and map generation.