Make sorting-method names translatable

i4/locale/template.txt

@@ -6,7 +6,9 @@ Settings=
 Go home=
 Digging=
 Digging (by chance)=
+Alphabetical=
 Sort items by name (A-Z)=
+Numerical=
 Sort items by number of items per stack=
 All=
 Nodes=

i4/src/api.lua

@@ -446,6 +446,7 @@ function i4.add_sorting_method(name, def)
 	insert(i4.sorting_methods, def)
 end
 
+-- S("Alphabetical")
 i4.add_sorting_method("alphabetical", {
 	description = S("Sort items by name (A-Z)"),
 	func = function(list, data)
@@ -454,6 +455,7 @@ i4.add_sorting_method("alphabetical", {
 	end
 })
 
+-- S("Numerical")
 i4.add_sorting_method("numerical", {
 	description = S("Sort items by number of items per stack"),
 	func = function(list, data)

i4/src/gui.lua

@@ -674,7 +674,7 @@ local function settings_footer_fs(player, data, fs)
 
 		local desc = i4.sorting_methods[data.sort].description
 		if desc then
-			tooltip(5.3, 10.6, 2.4, 0.5, ESC(desc))
+			tooltip(5.3, 10.6, 2.4, 0.5, S(desc))
 		end
 
 		fs("tooltip[cb_inv_compress;%s;#32333899;#fff]",