More market work (getting close to completion)

* Can now create market offers with fully working UI.
* All filtering is now completed (just need to finish word searching).
* Added some user friendly features to offer selections and item displays (show amount in depot).
* Some more UI ascetics.
* Some other minor market fixes.

TODO:
* Finishing applying changes for latest module updates by edubart.
* Finish buying/selling existing offers.
* Word searching items.
* Offer management.
* Full cipsoft tibia testing.

modules/game_market/market.otmod

@@ -1,16 +1,9 @@
 Module
   name: game_market
-  description: Manage the Players Market system
+  description: Global item market system
   author: BeniS
   website: www.otclient.info
-
-  @onLoad: |
-    dofile 'marketoffer'
-    dofile 'marketprotocol'
-    dofile 'market'
-    MarketProtocol.init()
-    Market.init()
-
-  @onUnload: |
-    MarketProtocol.terminate()
-    Market.terminate()
+  sandboxed: true
+  scripts: [marketoffer.lua, marketprotocol.lua, market.lua]
+  @onLoad: init()
+  @onUnload: terminate()