Make tab-buttons translatable

That is, "Crafting”, “Armor”, etc.

i4/init.lua

@@ -30,6 +30,9 @@ i4 = {
 		inventory_size = tonumber(core.settings:get"i4_inventory_size") or (storage:get_int"imported_from_i3" and 36),
 	},
 
+	-- S("Crafting");  S("Armor")
+	-- S("Waypoints"); S("Skins")
+	-- S("Bag")
 	categories = {
 		"crafting",
 		"armor",

i4/locale/template.txt

@@ -1,4 +1,9 @@
 # textdomain: i4
+Crafting=
+Armor=
+Waypoints=
+Skins=
+Bag=
 Inventory=
 Clear inventory=
 Sort inventory=

i4/src/gui.lua

@@ -528,11 +528,12 @@ local function get_container(fs, data, player, yoffset, ctn_len, award_list, awa
 
 	for i, title in ipairs(i4.categories) do
 		local btn_name = fmt("btn_%s", title)
+		local caps_title = title:gsub("^%l", upper)
 		fs("style[btn_%s;fgimg=%s;fgimg_hovered=%s;content_offset=0]", title,
 			data.subcat == i and PNG[fmt("%s_hover", title)] or PNG[title],
 			PNG[fmt("%s_hover", title)])
 		image_button(0.25 + ((i - 1) * 1.18), yextra - 0.2, 0.5, 0.5, "", btn_name, "")
-		fs("tooltip[%s;%s;#32333899;#fff]", btn_name, title:gsub("^%l", upper))
+		fs("tooltip[%s;%s;#32333899;#fff]", btn_name, S(caps_title))
 	end
 
 	box(0, yextra + 0.45, ctn_len, 0.045, "#bababa50")