Preload properly with g_textures.preload

* Thanks Baxnie for advising me of this method :)

modules/game_cooldown/cooldown.lua

@@ -25,10 +25,9 @@ function init()
   contentsPanel = cooldownWindow:getChildById('contentsPanel')
   cooldownPanel = contentsPanel:getChildById('cooldownPanel')
 
-  -- load cooldown icons
-  local iconIds = Spells.getSpellIconIds()
-  for k,id in pairs(iconIds) do
-    loadIcon(id):destroy()
+  -- preload cooldown images
+  for k,v in pairs(SpelllistSettings) do
+    g_textures.preload(v.iconFile)
   end
 
   if g_game.isOnline() then

modules/game_healthinfo/healthinfo.lua

@@ -50,7 +50,7 @@ function init()
 
   -- load condition icons
   for k,v in pairs(Icons) do
-    loadIcon(k):destroy()
+    g_textures.preload(v.path)
   end
 
   if g_game.isOnline() then

modules/gamelib/spells.lua

@@ -371,6 +371,17 @@ function Spells.getSpellIconIds()
   return ids
 end
 
+function Spells.getSpellProfileById(id)
+  for profile,data in pairs(SpellInfo) do
+    for k,spell in pairs(data) do
+      if spell.id == id then
+        return profile
+      end
+    end
+  end
+  return nil
+end
+
 function Spells.getSpellProfileByWords(words)
   for profile,data in pairs(SpellInfo) do
     for k,spell in pairs(data) do