loader: insert spaces around menu title

Small visual nit, make menu title more clean

MFC after: 3 days

stand/forth/menu.4th

@@ -489,7 +489,8 @@ also menu-infrastructure definitions
 	if ( use default center alignement? )
 		menuX @ 19 + over 2 / - menuY @ 1-
 	then
-	at-xy type 
+	swap 1- swap
+	at-xy space type space
 
 	\ If $menu_init is set, evaluate it (allowing for whole menus to be
 	\ constructed dynamically -- as this function could conceivably set

stand/lua/drawer.lua

@@ -285,8 +285,8 @@ local function drawbox()
 	if menu_header_x == nil then
 		menu_header_x = x + (w // 2) - (#menu_header // 2)
 	end
-	screen.setcursor(menu_header_x, y)
-	printc(menu_header)
+	screen.setcursor(menu_header_x - 1, y)
+	printc(" " .. menu_header .. " ")
 end
 
 local function drawbrand()