Allows configuring the width of the coast in tropic maps that generates as tropiczone_normal before the desert kicks in, it does this by creating two additional arrays which house the coordinates to create a filled circle of radius of 19 tiles, and 25 tiles. the default creates a radius of 13 tiles.

I'd eventually like to add an Extra Large setting but manually creating the array of coordinates is horrible.

I wedged this setting in beside the setting for tropic width around rivers despite it not fitting into the rivers/lakes category because it still feels the most relevant place for now.

src/table/settings/settings.ini

@@ -3890,6 +3890,20 @@ strval   = STR_JUST_COMMA
 cat      = SC_BASIC
 patxname = ""rivers.game_creation.river_tropics_width""
 
+[SDT_VAR]
+var      = game_creation.coast_tropics_width
+type     = SLE_UINT8
+flags    = SF_GUI_DROPDOWN | SF_NEWGAME_ONLY
+def      = 0
+min      = 0
+max      = 2
+interval = 1
+str      = STR_CONFIG_SETTING_COAST_TROPICS_WIDTH
+strhelp  = STR_CONFIG_SETTING_COAST_TROPICS_WIDTH_HELPTEXT
+strval   = STR_CONFIG_SETTING_COAST_TROPICS_WIDTH_DEFAULT
+cat      = SC_BASIC
+patxname = ""rivers.game_creation.coast_tropics_width""
+
 [SDT_VAR]
 var      = game_creation.lake_size
 type     = SLE_UINT8