fix formspecs and use the inventory sizes for cardboard box and medicine cabinet, that their formspecs allowed to use before

homedecor/misc-bathroom.lua

@@ -89,7 +89,7 @@ homedecor.register("medicine_cabinet", {
 	end,
 	infotext=S("Medicine cabinet"),
 	inventory = {
-		size=16,
+		size=6,
 	},
 })
 

homedecor/misc-nodes.lua

@@ -327,7 +327,7 @@ homedecor.register("cardboard_box", {
 	sounds = default.node_sound_wood_defaults(),
 	infotext=S("Cardboard box"),
 	inventory = {
-		size=8,
+		size=4,
 	},
 })
 

homedecor/registration_handler.lua

@@ -8,12 +8,20 @@ end
 
 local default_inventory_size = 32
 local default_inventory_formspecs = {
+	["4"]="size[8,6]"..
+	"list[context;main;2,0;4,1;]"..
+	"list[current_player;main;0,2;8,4;]",
+
+	["6"]="size[8,6]"..
+	"list[context;main;1,0;6,1;]"..
+	"list[current_player;main;0,2;8,4;]",
+
 	["8"]="size[8,6]"..
 	"list[context;main;0,0;8,1;]"..
 	"list[current_player;main;0,2;8,4;]",
 
 	["12"]="size[8,7]"..
-	"list[context;main;0,0;8,2;]"..
+	"list[context;main;1,0;6,2;]"..
 	"list[current_player;main;0,3;8,4;]",
 
 	["16"]="size[8,7]"..